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Frank Westheimer

Frank Henry Westheimer (January 15, 1912 – April 14, 2007) was an American chemist. He taught at the University of Chicago from 1936 to 1954, and at Harvard University from 1953 to 1983, becoming the Morris Loeb Professor of Chemistry in 1960, and Professor Emeritus in 1983.[2] The Westheimer medal was established in his honor in 2002.[3]

Frank Westheimer
Born(1912-01-15)January 15, 1912
DiedApril 14, 2007(2007-04-14) (aged 95)
Alma materDartmouth College (BA)
Harvard University (MS, PhD)
Known forMechanisms of enzyme catalysis, and kinetic isotope effects
AwardsCentenary Prize (1962)
Willard Gibbs Award (1970)
NAS Award in Chemical Sciences (1980)
Rosenstiel Award (1980)
Arthur C. Cope Award (1982)
Welch Award in Chemistry (1982)
William H. Nichols Medal (1982)
National Medal of Science (1986)
Priestley Medal (1988)
Nakanishi Prize (1997)
Scientific career
FieldsPhysical organic chemistry
InstitutionsNational Academy of Sciences
Harvard University
Doctoral advisorJames Bryant Conant, Elmer P. Kohler
Doctoral studentsEmil T. Kaiser, Roberta F. Colman, Steven A. Benner

Westheimer did pioneering work in physical organic chemistry,[4] applying techniques from physical to organic chemistry and integrating the two fields.[5] He explored the mechanisms of chemical and enzymatic reactions,[6] and made fundamental theoretical advances.[5]

Westheimer worked with John Gamble Kirkwood on the Bjerrum electrostatic analysis of carboxylic acids;[4][7][8] with Joseph Edward Mayer on the calculation of molecular mechanics;[4][9] explored the mechanisms of enzyme catalysis with Birgit Vennesland[4][6][10] and determined the mechanisms of chromic acid oxidations and kinetic isotope effects.[11][12]

He received the National Medal of Science in 1986 "For his series of extraordinary, original and penetrating investigations of the mechanisms of organic and enzymic reactions, which have played an unequaled role in the advancement of our knowledge of the ways in which chemical and biochemical processes proceed."[13]

Early life and education edit

Frank Henry Westheimer was born on January 15, 1912, to Henry F. Westheimer (1870–1960) and Carrie C (Burgunder) Westheimer (1887–1972) of Baltimore, Maryland.

He graduated from Dartmouth College in 1932. He went on to Harvard University, where he earned his masters in chemistry in 1933 and his doctorate in chemistry in 1935.[2]

Westheimer came to Harvard hoping to do research with James Bryant Conant. When told that Conant would not take on new students, Westheimer outwaited him and was finally accepted as his last graduate student.[14]: 16–17  Westheimer did some work on semicarbazone at Conant's suggestion.[14]: 17  Conant also suggested that Westheimer work during the summer with Alsoph Corwin at Johns Hopkins University. By doing porphyrin synthesis with Corwin, Westheimer gained needed laboratory experience.[14]: 21–23 

In 1933, Conant became president of Harvard in 1933 and ceased doing research. Nonetheless, Conant's interactions with Westheimer had a lasting effect,[14]: 24–25  impressing Westheimer with the need "to do important things".[15]

"The notion that Conant essentially was saying, 'Well, that problem is all right, but good God, you can do better,' was very important to me. From then on, I tried to ask myself about problems, whether they were really worth the investment of time."[14]: 24–25 

Westheimer completed his Ph.D. with E.P. Kohler. Although Westheimer described Kohler's organic chemistry class as "marvelous",[14]: 26  Kohler gave Westheimer little direction or feedback about his research, which was largely self-directed. Another of Kohler's students, Max Tishler, expanded upon some of Westheimer's research, leading to a co-publication on the derivation of a furanol.[14]: 17–18 [16]

In 1935 and 1936, as a National Research Council Fellow, Westheimer worked with physical chemist Louis P. Hammett at Columbia University. Hammett was a founder of the field of physical organic chemistry.[17]

Career edit

Westheimer taught at the University of Chicago from 1936 to 1954, and at Harvard University from 1953 to 1983.[2] He served as chairman of the chemistry department at Harvard from 1959 to 1962.[1] He became the Morris Loeb Professor of Chemistry at Harvard in 1960. He retired from teaching to become Professor Emeritus in 1983, and retired from research in 1988.[2][1]

University of Chicago edit

Westheimer's first academic appointment was an independent Research Associateship at the University of Chicago, from 1936 to 1937. He became an instructor in 1937 and a Professor in 1948.[1] As a lecturer in chemistry he taught the university's first course in physical organic chemistry.[14]: 43 

During Westheimer's second year at Chicago, John Gamble Kirkwood taught there. Westheimer worked with Kirkwood on problems in organic chemistry involving electrostatics. Westheimer related electrostatics to their effects on the properties of organic compounds.[14]: 43–47  Kirkwood and Westheimer published four classical papers developing fundamental ideas in enzymology about the theory of the electrostatic influence of substituents on the dissociation constants of organic acids.[1] They developed a Bjerrum electrostatic analysis of carboxylic acids.[4][7][8] Their Kirkwood-Westheimer model for an ellipsoid cavity reconciles the work of Niels Bjerrum on dibasic acids with that of Arnold Eucken on dipole substituted acids, showing that they could coexist in the same physical world.[14]: 43–47 [18] Elaborations and fuller testing of their ideas have required forty years and the development of computers.[14]: 43–47 [18]

During World War II, from 1943 to 1945, Westheimer worked for the National Defense Research Committee.[14]: 69–71 [2] He was a supervisor at the Explosives Research Laboratory in Bruceton, Pennsylvania.[1][19] He did research on nitric acid, discovering a new acidity function for nitration reactions. He hesitated to discuss his work on the triphenyl carbinol series with physical chemists because of the secrecy requirements of the project. Other researchers such as Christopher Ingold were first to publish in the area.[14]: 69–71 

Westheimer was also influenced by the development of statistical mechanics by physicists Joseph Edward Mayer and Maria Goeppert-Mayer, who moved to the University of Chicago in 1945. Westheimer applied the principles of statistical mechanics to the structure of organic molecules, to better understand the ways in which molecules are assembled from atoms. Westheimer first consulted Mayer about applying techniques from statistical mechanics to the racemization of optically active biphenyls. All of his calculations were worked out by hand.[14]: 65, 66–68  The work became a model for studies of other elements and is considered foundational.[20] The field of molecular mechanics, as it is now known, has wide applications.[4][9][21][22]

In 1943, Westheimer began publishing on the mechanisms of chromic acid oxidations, publishing a "masterly review" of the area in 1949.[1][11]

In 1950, University of Chicago biochemist Birgit Vennesland approached Westheimer about a project she and her student Harvey Fisher were doing, involving isotopes in enzyme reactions. Vennesland had developed a project involving the fate of hydrogen atoms in alcohol dehydrogenase. Vennesland and Fisher's results were puzzling in that a specific hydrogen in the pair at C1 in ethanol appeared to be uniquely reactive in the presence of the enzyme. Westheimer joined the project and helped develop an explanation based on the idea of enantiotopicity[6] to explain how the enzyme alcohol dehydrogenase removed hydrogen from the alcohol molecule, enabling the body to metabolize alcohol.[20] The researchers published two classic papers in 1953, "the first demonstration of the enzymatic discrimination between the two enantiotopic hydrogen atoms on the methylene carbon atom of ethanol."[6][23][24] The phenomenon they reported was not named enantiospecificity until much later.[25] Westheimer designed additional experiments that proved their initial conjecture and established the isotope-based chirality of enzymes. This work was essential to understanding topicity, the enantiotopic and diastereotopic relationships between groups (or atoms) within molecules.[25] In 2006, their 1953 paper (part I) received a Citation for Chemical Breakthrough Award from the Division of the History of Chemistry of the American Chemical Society.[26]

Harvard University edit

In 1953, soon after completing the work on alcohol dehydrogenase, Westheimer moved to Harvard University. He continued his interest in reaction mechanisms, isotopes and oxidation. In 1955, Westheimer published the first of many articles on the chemistry of phosphate esters and phosphorus derivatives.[1]

He proposed that ATP transfers phosphate through a reactive monomeric metaphosphate species. While this did not turn out to be the literal case, many enzymic reactions do proceed through transition states that have this as a significant component.[27]

In a 1961 article, Westheimer applied ideas from statistical mechanics to the effects of isotopic substitution on the reactivity of organic molecules.[12] His work on the magnitude of kinetic isotope effects (KIEs) is still the basis of understanding in the field.[28]: 418 [29][30] Transition state structure's dependence on the kinetic isotope effect is known as the Westheimer Effect.[31] The standard nontunnelling approach to KIEs is developed from Westheimer[12] and Lars Melander.[32][28]: 550, 561  The Melander-Westheimer postulate has successfully predicted the ways in which KIEs and transition state (TS) structures vary.[33]

Westheimer introduced the idea of photoaffinity labeling of the active site of proteins.[34] The identification of the "active sites" of an enzyme is difficult in cases where proteins have hydrocarbon-rich sites. In 1962, Westheimer and others demonstrated the synthesis of p-nitrophenyl diazoacetate and the subsequent acylation of chymotrypsin to form diazoacetylchymotrypsin, which was then photolyzed. The introduction of an aliphatic diazo group into a bifunctional reagent enabled it to react with the enzyme. The photolabel generated a reactive carbenoid species capable of inserting into hydrocarbon C-H bonds.[35]

Westheimer also approached the reactions of phosphate transfer through mechanisms that involve five-coordinate intermediates. In 1968, Westheimer examined pseudorotation in phosphate ester chemistry[6] and predicted the occurrence of pseudo-rotation of oxyphosphoranes.[36] He showed the significance of this route and the importance of stereochemical rearrangements of the intermediates. Westheimer developed a set of guidelines, based on experimental observations, also known as Westheimer's rules. They have been widely used for describing and predicting the products and stereochemistry of substitution reactions involving phosphorus.[37][38]

Westheimer's 1987 paper in Science, "Why nature chose phosphates", discusses the importance of phosphates as signaling and building blocks for living organisms. Phosphates possess a value of pKa that allows them to be doubly ionized at physiological pH. The singly ionized form in the phosphodiester linkages of nucleic acids resists being hydrolyzed by water, but is not so stable that it won't undergo enzymatic hydrolysis.[39] This work continues to challenge and inspire researchers studying biological chemistry and reactions in RNA, DNA, and ribozymes.[40][41][42][43]

Awards and honors edit

Westheimer became a member of the National Academy of Sciences in 1954,[44] a member of the American Philosophical Society in 1976,[45] and a foreign member of the Royal Society of London in 1983.[46][47]

He chaired the National Academy of Sciences Committee for the Survey of Chemistry from 1964 to 1965.[1] Chemistry: Opportunities and Needs, also known as the "Westheimer Report", encouraged the federal government to increase spending on fundamental research in chemistry, to achieve parity with other physical sciences.[48][49] It identified biochemistry as a promising and overlooked area for medical and pharmaceutical research.[20] The report's recommendations were implemented, and it is still considered to be "comprehensive, definitive, and forward-looking".[5]

Westheimer was a member of President Lyndon Johnson's science advisory committee from 1967 to 1970.[20]

Westheimer served on the Council of the National Academy of Sciences for two terms, from 1973 to 1975 and 1976-1978, as well as being a Councillor of the American Philosophical Society (1981-1984), and Secretary of the American Academy of Arts and Sciences (1985-1990).[1]

As well as emphasizing the need for fundamental research, Westheimer was concerned about other political issues. He argued against wars in Vietnam and Iraq. He was aware of environmental issues, supporting measures to decrease pollution, combat global warming, increase energy conservation, and develop alternative energy sources. He advocated that science needed to be taught in new ways, to better educate nonscientists about scientific issues.[5]

Among Westheimer's many honors[1] are the U.S. National Academy Award in Chemical Sciences in 1980,[50] the Robert A. Welch Foundation Award in 1982,[51] the Golden Plate Award of the American Academy of Achievement in 1981,[52] the U.S. National Medal of Science in 1986,[13][53] the Priestley Medal in 1988;[54] the Repligen Award for the Chemistry of Biological Processes in 1992;[1] and the Nakanishi Prize in 1997.[55][2]

"Over a span of four decades, Westheimer repeatedly demonstrated an ability to take up a fundamental scientific problem — one that appeared either insoluble or very difficult — and to solve it in an elegant and completely definitive way... He enjoyed going on to new challenges more than exploiting the large new areas that he had opened up." Elias James Corey, 2007[5]

The Westheimer medal was established in his honor in 2002. The medal is awarded by Harvard University "for distinguished research into the field of chemistry", particularly in the areas of organic and biological chemistry.[3]

Family edit

Frank H. Westheimer was married in 1937 to Jeanne E. Friedman.[5] They had two children, Ellen Westheimer and Ruth Susan Westheimer.[20][5]

References edit

  1. ^ a b c d e f g h i j k l Zerner, Burt (1992). "Frank Henry Westheimer: The celebration of a lifetime in chemistry". Bioorganic Chemistry. 20 (4): 269–284. doi:10.1016/0045-2068(92)90038-5.
  2. ^ a b c d e f Center for Oral History. "Frank H. Westheimer". Science History Institute.
  3. ^ a b Cromie, William J. (October 3, 2002). "New chemistry medal is established: Named for professor emeritus Frank Westheimer". The Harvard Gazette. Retrieved 6 March 2018.
  4. ^ a b c d e f Roberts, John D. (1996). "The beginnings of physical organic chemistry in the United States" (PDF). Bulletin for the History of Chemistry. 19. Retrieved 6 March 2018.
  5. ^ a b c d e f g Corey, E. J. (April 19, 2007). "Frank H. Westheimer, major figure in 20th century chemistry, dies at 95". Harvard Gazette. Retrieved 6 March 2018.
  6. ^ a b c d e Simoni, Robert D.; Hill, Robert L.; Vaughan, Martha (January 16, 2004). "The Stereochemistry and Reaction Mechanism of Dehydrogenases and Their Coenzymes, DPN (NAD) and TPN (NADP): the Work of Birgit Vennesland". The Journal of Biological Chemistry. 279 (3): e3. doi:10.1016/S0021-9258(20)73581-7. Retrieved 6 March 2018.
  7. ^ a b Kirkwood, J. G.; Westheimer, F. H. (September 1938). "The Electrostatic Influence of Substituents on the Dissociation Constants of Organic Acids. I". The Journal of Chemical Physics. 6 (9): 506–512. Bibcode:1938JChPh...6..506K. doi:10.1063/1.1750302.
  8. ^ a b Westheimer, F. H.; Kirkwood, J. G. (September 1938). "The Electrostatic Influence of Substituents on the Dissociation Constants of Organic Acids. II". The Journal of Chemical Physics. 6 (9): 513–517. Bibcode:1938JChPh...6..513W. doi:10.1063/1.1750303.
  9. ^ a b Westheimer, F. H.; Mayer, Joseph E. (December 1946). "The Theory of the Racemization of Optically Active Derivatives of Diphenyl". The Journal of Chemical Physics. 14 (12): 733–738. Bibcode:1946JChPh..14..733W. doi:10.1063/1.1724095.
  10. ^ Westheimer, F. H.; Fisher, Harvey F.; Conn, Eric E.; Vennesland, Birgit (May 1951). "The enzymatic transfer of hydrogen from alcohol to DPN". Journal of the American Chemical Society. 73 (5): 2403. doi:10.1021/ja01149a561.
  11. ^ a b Westheimer, F. H. (December 1949). "The Mechanisms of Chromic Acid Oxidations". Chemical Reviews. 45 (3): 419–451. doi:10.1021/cr60142a002.
  12. ^ a b c Westheimer, F. H. (1 June 1961). "The Magnitude of the Primary Kinetic Isotope Effect for Compounds of Hydrogen and Deuterium". Chemical Reviews. 61 (3): 265–273. doi:10.1021/cr60211a004.
  13. ^ a b "The President's National Medal of Science: Recipient Details Frank H. Westheimer". National Science Foundation. Retrieved 9 March 2018.
  14. ^ a b c d e f g h i j k l m n Gortler, Leon (5 January 1979). Frank H. Westheimer, Transcript of an Interview Conducted by Leon Gortler at Harvard University on 4 and 5 January 1979 (PDF). Philadelphia, PA: Beckman Center for the History of Chemistry.
  15. ^ Hargittai, István (September 2002). "Candid Chemistry". Chemistry International. 24 (5). Retrieved 6 March 2018.
  16. ^ Kohler, E. P.; Westheimer, F. H.; Tishler, M. (February 1936). "Hydroxy Furans. I. Beta Hydroxy Triphenylfuran". Journal of the American Chemical Society. 58 (2): 264–267. doi:10.1021/ja01293a020.
  17. ^ "Chandler Medal to Frank Westheimer". University Record. Vol. 6, no. 10. Columbia University. 7 November 1980. Retrieved 6 March 2018.
  18. ^ a b Jensen, Frank (2008). Introduction to computational chemistry. Chichester: Wiley. ISBN 978-0-470-01186-7. Retrieved 6 March 2018.
  19. ^ Saxe, Robert L. (April 27, 1954). "Chemistry Dept. Shapes Venture in Biochemistry Bloch, Westheimer Named Professors". The Harvard Crimson. Retrieved 6 March 2018.
  20. ^ a b c d e Pearce, Jeremy (April 21, 2007). "Frank Westheimer, 95, Who Developed Model Valuable in Biochemistry, Dies". The New York Times. Retrieved 6 March 2018.
  21. ^ Hursthouse, M. B.; Moss, G. P.; Sales, K. D. (1978). "Chapter 3. Theoretical chemistry: Applications of molecular mechanics calculations". Annu. Rep. Prog. Chem., Sect. B: Org. Chem. 75: 23–35. doi:10.1039/OC9787500023.
  22. ^ Carroll, Felix A. (2010). Perspectives on structure and mechanism in organic chemistry (2nd ed.). Hoboken, N.J.: John Wiley. p. 135. ISBN 978-0470276105. Retrieved 8 March 2018.
  23. ^ Fisher, H. F.; Conn, E. E.; Vennesland, B.; Westheimer, F. H. (1953). "The Enzymatic Transfer of Hydrogen. I. The Reaction Catalyzed by Alcohol Dehydrogenase". J. Biol. Chem. 202 (2): 687–697. doi:10.1016/S0021-9258(18)66181-2. PMID 13061492.
  24. ^ Loewus, F. A.; Ofner, P.; Fisher, H.F.; Westheimer, F. H.; Vennesland, B. (1953). "The Enzymatic Transfer of Hydrogen. II. The Reaction Catalyzed by Lactic Dehydrogenase". J. Biol. Chem. 202 (2): 699–704. doi:10.1016/S0021-9258(18)66182-4. PMID 13061493.
  25. ^ a b Ault, Addison (September 2008). "Frank Westheimer's Early Demonstration of Enzymatic Specificity". Journal of Chemical Education. 85 (9): 1246. Bibcode:2008JChEd..85.1246A. doi:10.1021/ed085p1246.
  26. ^ "Citations for Chemical Breakthrough Awards". Division of the History of Chemistry. Retrieved 9 March 2018.
  27. ^ Lassila, Jonathan K.; Zalatan, Jesse G.; Herschlag, Daniel (7 July 2011). "Biological Phosphoryl-Transfer Reactions: Understanding Mechanism and Catalysis". Annual Review of Biochemistry. 80 (1): 669–702. doi:10.1146/annurev-biochem-060409-092741. PMC 3418923. PMID 21513457.
  28. ^ a b Kohen, Amnon; Limbach, Hans-Heinrich (2006). Isotope effects in chemistry and biology. Boca Raton, Fla.: Taylor & Francis. ISBN 9780824724498. Retrieved 8 March 2018.
  29. ^ Glad, Sanne Schrøder; Jensen, Frank (January 1997). "Kinetic Isotope Effects and Transition State Geometries. A Theoretical Investigation of E2 Model Systems". The Journal of Organic Chemistry. 62 (2): 253–260. doi:10.1021/jo9618379. PMID 11671397.
  30. ^ Agmon, Noam (1985). "Extensions of the Melander-Westheimer Postulate: Isotope Effects in Reactions with Equilibrium Values Far from Unity". Israel Journal of Chemistry. 26 (4): 375–377. doi:10.1002/ijch.198500122.
  31. ^ Thompson, J. M. T. (2001). Visions of the future: chemistry and life science. Cambridge, Massachusetts: Cambridge University Press. p. 27. ISBN 978-0521805391. Retrieved 8 March 2018.
  32. ^ Melander, Lars (1960). Isotope Effects on Reaction Rates. New York: Ronald Press.
  33. ^ Wang, Yong; Kumar, Devesh; Yang, Chuanlu; Han, Keli; Shaik, Sason (July 2007). "Theoretical Study of -Demethylation of Substituted -Dimethylanilines by Cytochrome P450: The Mechanistic Significance of Kinetic Isotope Effect Profiles". The Journal of Physical Chemistry B. 111 (26): 7700–7710. doi:10.1021/jp072347v. PMID 17559261.
  34. ^ Smith, Ewan; Collins, Ian (February 2015). "Photoaffinity labeling in target- and binding-site identification". Future Medicinal Chemistry. 7 (2): 159–183. doi:10.4155/fmc.14.152. PMC 4413435. PMID 25686004.
  35. ^ Singh, A; Thornton, ER; Westheimer, FH (September 1962). "The photolysis of diazoacetylchymotrypsin". The Journal of Biological Chemistry. 237 (9): 3006–8. doi:10.1016/S0021-9258(18)60265-0. PMID 13913310. Retrieved 7 March 2018.
  36. ^ Westheimer, F.H.. (January 1968). "Pseudo-rotation in the hydrolysis of phosphate esters". Accounts of Chemical Research. 1 (3): 70–78. CiteSeerX 10.1.1.557.9702. doi:10.1021/ar50003a002. Retrieved 7 March 2018.
  37. ^ Bethell, D. (1989). Advances in physical organic chemistry. Vol. 25. London: Academic Press. pp. 122–139. ISBN 9780080581644. Retrieved 8 March 2018.
  38. ^ Erdmann, Volker A.; Markiewicz, Wojciech T.; Barciszewski, Jan (2014). Chemical Biology of Nucleic Acids Fundamentals and Clinical Applications (Aufl. 2014 ed.). Berlin: Springer Verlag. p. 43. ISBN 9783642544514. Retrieved 8 March 2018.
  39. ^ "Why nature chose phosphates". The Curious Waveform. February 23, 2009. Retrieved 9 March 2018.
  40. ^ Westheimer, FH (6 March 1987). "Why nature chose phosphates". Science. 235 (4793): 1173–8. Bibcode:1987Sci...235.1173W. doi:10.1126/science.2434996. PMID 2434996.
  41. ^ Kamerlin, Shina C. L.; Sharma, Pankaz K.; Prasad, Ram B.; Warshel, Arieh (2013). "Why nature really chose phosphate". Quarterly Reviews of Biophysics. 46 (1): 1–132. doi:10.1017/S0033583512000157. PMC 7032660. PMID 23318152.
  42. ^ Hunter, T. (13 August 2012). "Why nature chose phosphate to modify proteins". Philosophical Transactions of the Royal Society B: Biological Sciences. 367 (1602): 2513–2516. doi:10.1098/rstb.2012.0013. PMC 3415839. PMID 22889903.
  43. ^ Reich, Hans J.; Hondal, Robert J. (21 March 2016). "Why Nature Chose Selenium". ACS Chemical Biology. 11 (4): 821–841. doi:10.1021/acschembio.6b00031. PMID 26949981.
  44. ^ "Frank H. Westheimer". National Academy of Sciences. Retrieved 9 March 2018.
  45. ^ "APS Member History". search.amphilsoc.org. Retrieved 2022-07-20.
  46. ^ "Jews elected to foreign membership in the British Royal Society, 1901-Present". JInfo. Retrieved 9 March 2018.
  47. ^ Benner, Steven; Corey, Elias J. (2018). "Frank Henry Westheimer. 15 January 1912—14 April 2007". Biographical Memoirs of Fellows of the Royal Society. doi:10.1098/rsbm.2018.0009
  48. ^ Laitinen, Herbert A. (March 1966). "Editorial. The Westheimer Report: Where is Analytical Chemistry?". Analytical Chemistry. 38 (3): 369. doi:10.1021/ac60235a600.
  49. ^ "Westheimer Report Seeks Increase In Spending for Chemical Research". The Harvard Crimson. December 4, 1965. Retrieved 9 March 2018.
  50. ^ "NAS Award in Chemical Sciences". National Academy of Sciences. Retrieved 9 March 2018.
  51. ^ "Welch Award in ChemistryPast Award Recipients". The Welch Foundation. Retrieved 9 March 2018.
  52. ^ "Golden Plate Awardees of the American Academy of Achievement". www.achievement.org. American Academy of Achievement.
  53. ^ "Frank H. Westheimer among winners of the National Medal of Science" (PDF). UCSanDiego. March 12, 1986. Retrieved 9 March 2018.
  54. ^ "ACS 1988 National Award Winners". Chemical & Engineering News. 65 (35): 48. 1987. doi:10.1021/cen-v065n035.p048. ISSN 0009-2347.
  55. ^ "Nakanishi Prize". American Chemical Society. Retrieved 9 March 2018.

External links edit

  • McLafferty, Fred W.; Abruña, Héctor D. A Conversation with Fred W. McLafferty 2006, 90 minute video, for Cornell University.
  • Center for Oral History. "Frank H. Westheimer". Science History Institute.
  • Gortler, Leon (5 January 1979). Frank H. Westheimer, Transcript of an Interview Conducted by Leon Gortler at Harvard University on 4 and 5 January 1979 (PDF). Philadelphia, PA: Beckman Center for the History of Chemistry.
  • Cromie, William J. (October 3, 2002). "New chemistry medal is established: Named for professor emeritus Frank Westheimer". The Harvard Gazette. Retrieved 6 March 2018.

Obituaries edit

  • Corey, E. J. (April 19, 2007). "Frank H. Westheimer, major figure in 20th century chemistry, dies at 95". Harvard Gazette. Retrieved 6 March 2018.
  • Pearce, Jeremy (April 21, 2007). "Frank Westheimer, 95, Who Developed Model Valuable in Biochemistry, Dies". The New York Times.
  • Wang, Linda (23 April 2007). "Frank Westheimer dies at 95". Chemical & Engineering News. 85 (17): 10. doi:10.1021/cen-v085n017.p010.

frank, westheimer, frank, henry, westheimer, january, 1912, april, 2007, american, chemist, taught, university, chicago, from, 1936, 1954, harvard, university, from, 1953, 1983, becoming, morris, loeb, professor, chemistry, 1960, professor, emeritus, 1983, wes. Frank Henry Westheimer January 15 1912 April 14 2007 was an American chemist He taught at the University of Chicago from 1936 to 1954 and at Harvard University from 1953 to 1983 becoming the Morris Loeb Professor of Chemistry in 1960 and Professor Emeritus in 1983 2 The Westheimer medal was established in his honor in 2002 3 Frank WestheimerBorn 1912 01 15 January 15 1912Baltimore Maryland U S 1 DiedApril 14 2007 2007 04 14 aged 95 Cambridge Massachusetts U S Alma materDartmouth College BA Harvard University MS PhD Known forMechanisms of enzyme catalysis and kinetic isotope effectsAwardsCentenary Prize 1962 Willard Gibbs Award 1970 NAS Award in Chemical Sciences 1980 Rosenstiel Award 1980 Arthur C Cope Award 1982 Welch Award in Chemistry 1982 William H Nichols Medal 1982 National Medal of Science 1986 Priestley Medal 1988 Nakanishi Prize 1997 Scientific careerFieldsPhysical organic chemistryInstitutionsNational Academy of SciencesHarvard UniversityDoctoral advisorJames Bryant Conant Elmer P KohlerDoctoral studentsEmil T Kaiser Roberta F Colman Steven A BennerWestheimer did pioneering work in physical organic chemistry 4 applying techniques from physical to organic chemistry and integrating the two fields 5 He explored the mechanisms of chemical and enzymatic reactions 6 and made fundamental theoretical advances 5 Westheimer worked with John Gamble Kirkwood on the Bjerrum electrostatic analysis of carboxylic acids 4 7 8 with Joseph Edward Mayer on the calculation of molecular mechanics 4 9 explored the mechanisms of enzyme catalysis with Birgit Vennesland 4 6 10 and determined the mechanisms of chromic acid oxidations and kinetic isotope effects 11 12 He received the National Medal of Science in 1986 For his series of extraordinary original and penetrating investigations of the mechanisms of organic and enzymic reactions which have played an unequaled role in the advancement of our knowledge of the ways in which chemical and biochemical processes proceed 13 Contents 1 Early life and education 2 Career 2 1 University of Chicago 2 2 Harvard University 3 Awards and honors 4 Family 5 References 6 External links 6 1 ObituariesEarly life and education editFrank Henry Westheimer was born on January 15 1912 to Henry F Westheimer 1870 1960 and Carrie C Burgunder Westheimer 1887 1972 of Baltimore Maryland He graduated from Dartmouth College in 1932 He went on to Harvard University where he earned his masters in chemistry in 1933 and his doctorate in chemistry in 1935 2 Westheimer came to Harvard hoping to do research with James Bryant Conant When told that Conant would not take on new students Westheimer outwaited him and was finally accepted as his last graduate student 14 16 17 Westheimer did some work on semicarbazone at Conant s suggestion 14 17 Conant also suggested that Westheimer work during the summer with Alsoph Corwin at Johns Hopkins University By doing porphyrin synthesis with Corwin Westheimer gained needed laboratory experience 14 21 23 In 1933 Conant became president of Harvard in 1933 and ceased doing research Nonetheless Conant s interactions with Westheimer had a lasting effect 14 24 25 impressing Westheimer with the need to do important things 15 The notion that Conant essentially was saying Well that problem is all right but good God you can do better was very important to me From then on I tried to ask myself about problems whether they were really worth the investment of time 14 24 25 Westheimer completed his Ph D with E P Kohler Although Westheimer described Kohler s organic chemistry class as marvelous 14 26 Kohler gave Westheimer little direction or feedback about his research which was largely self directed Another of Kohler s students Max Tishler expanded upon some of Westheimer s research leading to a co publication on the derivation of a furanol 14 17 18 16 In 1935 and 1936 as a National Research Council Fellow Westheimer worked with physical chemist Louis P Hammett at Columbia University Hammett was a founder of the field of physical organic chemistry 17 Career editWestheimer taught at the University of Chicago from 1936 to 1954 and at Harvard University from 1953 to 1983 2 He served as chairman of the chemistry department at Harvard from 1959 to 1962 1 He became the Morris Loeb Professor of Chemistry at Harvard in 1960 He retired from teaching to become Professor Emeritus in 1983 and retired from research in 1988 2 1 University of Chicago edit Westheimer s first academic appointment was an independent Research Associateship at the University of Chicago from 1936 to 1937 He became an instructor in 1937 and a Professor in 1948 1 As a lecturer in chemistry he taught the university s first course in physical organic chemistry 14 43 During Westheimer s second year at Chicago John Gamble Kirkwood taught there Westheimer worked with Kirkwood on problems in organic chemistry involving electrostatics Westheimer related electrostatics to their effects on the properties of organic compounds 14 43 47 Kirkwood and Westheimer published four classical papers developing fundamental ideas in enzymology about the theory of the electrostatic influence of substituents on the dissociation constants of organic acids 1 They developed a Bjerrum electrostatic analysis of carboxylic acids 4 7 8 Their Kirkwood Westheimer model for an ellipsoid cavity reconciles the work of Niels Bjerrum on dibasic acids with that of Arnold Eucken on dipole substituted acids showing that they could coexist in the same physical world 14 43 47 18 Elaborations and fuller testing of their ideas have required forty years and the development of computers 14 43 47 18 During World War II from 1943 to 1945 Westheimer worked for the National Defense Research Committee 14 69 71 2 He was a supervisor at the Explosives Research Laboratory in Bruceton Pennsylvania 1 19 He did research on nitric acid discovering a new acidity function for nitration reactions He hesitated to discuss his work on the triphenyl carbinol series with physical chemists because of the secrecy requirements of the project Other researchers such as Christopher Ingold were first to publish in the area 14 69 71 Westheimer was also influenced by the development of statistical mechanics by physicists Joseph Edward Mayer and Maria Goeppert Mayer who moved to the University of Chicago in 1945 Westheimer applied the principles of statistical mechanics to the structure of organic molecules to better understand the ways in which molecules are assembled from atoms Westheimer first consulted Mayer about applying techniques from statistical mechanics to the racemization of optically active biphenyls All of his calculations were worked out by hand 14 65 66 68 The work became a model for studies of other elements and is considered foundational 20 The field of molecular mechanics as it is now known has wide applications 4 9 21 22 In 1943 Westheimer began publishing on the mechanisms of chromic acid oxidations publishing a masterly review of the area in 1949 1 11 In 1950 University of Chicago biochemist Birgit Vennesland approached Westheimer about a project she and her student Harvey Fisher were doing involving isotopes in enzyme reactions Vennesland had developed a project involving the fate of hydrogen atoms in alcohol dehydrogenase Vennesland and Fisher s results were puzzling in that a specific hydrogen in the pair at C1 in ethanol appeared to be uniquely reactive in the presence of the enzyme Westheimer joined the project and helped develop an explanation based on the idea of enantiotopicity 6 to explain how the enzyme alcohol dehydrogenase removed hydrogen from the alcohol molecule enabling the body to metabolize alcohol 20 The researchers published two classic papers in 1953 the first demonstration of the enzymatic discrimination between the two enantiotopic hydrogen atoms on the methylene carbon atom of ethanol 6 23 24 The phenomenon they reported was not named enantiospecificity until much later 25 Westheimer designed additional experiments that proved their initial conjecture and established the isotope based chirality of enzymes This work was essential to understanding topicity the enantiotopic and diastereotopic relationships between groups or atoms within molecules 25 In 2006 their 1953 paper part I received a Citation for Chemical Breakthrough Award from the Division of the History of Chemistry of the American Chemical Society 26 Harvard University edit In 1953 soon after completing the work on alcohol dehydrogenase Westheimer moved to Harvard University He continued his interest in reaction mechanisms isotopes and oxidation In 1955 Westheimer published the first of many articles on the chemistry of phosphate esters and phosphorus derivatives 1 He proposed that ATP transfers phosphate through a reactive monomeric metaphosphate species While this did not turn out to be the literal case many enzymic reactions do proceed through transition states that have this as a significant component 27 In a 1961 article Westheimer applied ideas from statistical mechanics to the effects of isotopic substitution on the reactivity of organic molecules 12 His work on the magnitude of kinetic isotope effects KIEs is still the basis of understanding in the field 28 418 29 30 Transition state structure s dependence on the kinetic isotope effect is known as the Westheimer Effect 31 The standard nontunnelling approach to KIEs is developed from Westheimer 12 and Lars Melander 32 28 550 561 The Melander Westheimer postulate has successfully predicted the ways in which KIEs and transition state TS structures vary 33 Westheimer introduced the idea of photoaffinity labeling of the active site of proteins 34 The identification of the active sites of an enzyme is difficult in cases where proteins have hydrocarbon rich sites In 1962 Westheimer and others demonstrated the synthesis of p nitrophenyl diazoacetate and the subsequent acylation of chymotrypsin to form diazoacetylchymotrypsin which was then photolyzed The introduction of an aliphatic diazo group into a bifunctional reagent enabled it to react with the enzyme The photolabel generated a reactive carbenoid species capable of inserting into hydrocarbon C H bonds 35 Westheimer also approached the reactions of phosphate transfer through mechanisms that involve five coordinate intermediates In 1968 Westheimer examined pseudorotation in phosphate ester chemistry 6 and predicted the occurrence of pseudo rotation of oxyphosphoranes 36 He showed the significance of this route and the importance of stereochemical rearrangements of the intermediates Westheimer developed a set of guidelines based on experimental observations also known as Westheimer s rules They have been widely used for describing and predicting the products and stereochemistry of substitution reactions involving phosphorus 37 38 Westheimer s 1987 paper in Science Why nature chose phosphates discusses the importance of phosphates as signaling and building blocks for living organisms Phosphates possess a value of pKa that allows them to be doubly ionized at physiological pH The singly ionized form in the phosphodiester linkages of nucleic acids resists being hydrolyzed by water but is not so stable that it won t undergo enzymatic hydrolysis 39 This work continues to challenge and inspire researchers studying biological chemistry and reactions in RNA DNA and ribozymes 40 41 42 43 Awards and honors editWestheimer became a member of the National Academy of Sciences in 1954 44 a member of the American Philosophical Society in 1976 45 and a foreign member of the Royal Society of London in 1983 46 47 He chaired the National Academy of Sciences Committee for the Survey of Chemistry from 1964 to 1965 1 Chemistry Opportunities and Needs also known as the Westheimer Report encouraged the federal government to increase spending on fundamental research in chemistry to achieve parity with other physical sciences 48 49 It identified biochemistry as a promising and overlooked area for medical and pharmaceutical research 20 The report s recommendations were implemented and it is still considered to be comprehensive definitive and forward looking 5 Westheimer was a member of President Lyndon Johnson s science advisory committee from 1967 to 1970 20 Westheimer served on the Council of the National Academy of Sciences for two terms from 1973 to 1975 and 1976 1978 as well as being a Councillor of the American Philosophical Society 1981 1984 and Secretary of the American Academy of Arts and Sciences 1985 1990 1 As well as emphasizing the need for fundamental research Westheimer was concerned about other political issues He argued against wars in Vietnam and Iraq He was aware of environmental issues supporting measures to decrease pollution combat global warming increase energy conservation and develop alternative energy sources He advocated that science needed to be taught in new ways to better educate nonscientists about scientific issues 5 Among Westheimer s many honors 1 are the U S National Academy Award in Chemical Sciences in 1980 50 the Robert A Welch Foundation Award in 1982 51 the Golden Plate Award of the American Academy of Achievement in 1981 52 the U S National Medal of Science in 1986 13 53 the Priestley Medal in 1988 54 the Repligen Award for the Chemistry of Biological Processes in 1992 1 and the Nakanishi Prize in 1997 55 2 Over a span of four decades Westheimer repeatedly demonstrated an ability to take up a fundamental scientific problem one that appeared either insoluble or very difficult and to solve it in an elegant and completely definitive way He enjoyed going on to new challenges more than exploiting the large new areas that he had opened up Elias James Corey 2007 5 The Westheimer medal was established in his honor in 2002 The medal is awarded by Harvard University for distinguished research into the field of chemistry particularly in the areas of organic and biological chemistry 3 Family editFrank H Westheimer was married in 1937 to Jeanne E Friedman 5 They had two children Ellen Westheimer and Ruth Susan Westheimer 20 5 References edit a b c d e f g h i j k l Zerner Burt 1992 Frank Henry Westheimer The celebration of a lifetime in chemistry Bioorganic Chemistry 20 4 269 284 doi 10 1016 0045 2068 92 90038 5 a b c d e f Center for Oral History Frank H Westheimer Science History Institute a b Cromie William J October 3 2002 New chemistry medal is established Named for professor emeritus Frank Westheimer The Harvard Gazette Retrieved 6 March 2018 a b c d e f Roberts John D 1996 The beginnings of physical organic chemistry in the United States PDF Bulletin for the History of Chemistry 19 Retrieved 6 March 2018 a b c d e f g Corey E J April 19 2007 Frank H Westheimer major figure in 20th century chemistry dies at 95 Harvard Gazette Retrieved 6 March 2018 a b c d e Simoni Robert D Hill Robert L Vaughan Martha January 16 2004 The Stereochemistry and Reaction Mechanism of Dehydrogenases and Their Coenzymes DPN NAD and TPN NADP the Work of Birgit Vennesland The Journal of Biological Chemistry 279 3 e3 doi 10 1016 S0021 9258 20 73581 7 Retrieved 6 March 2018 a b Kirkwood J G Westheimer F H September 1938 The Electrostatic Influence of Substituents on the Dissociation Constants of Organic Acids I The Journal of Chemical Physics 6 9 506 512 Bibcode 1938JChPh 6 506K doi 10 1063 1 1750302 a b Westheimer F H Kirkwood J G September 1938 The Electrostatic Influence of Substituents on the Dissociation Constants of Organic Acids II The Journal of Chemical Physics 6 9 513 517 Bibcode 1938JChPh 6 513W doi 10 1063 1 1750303 a b Westheimer F H Mayer Joseph E December 1946 The Theory of the Racemization of Optically Active Derivatives of Diphenyl The Journal of Chemical Physics 14 12 733 738 Bibcode 1946JChPh 14 733W doi 10 1063 1 1724095 Westheimer F H Fisher Harvey F Conn Eric E Vennesland Birgit May 1951 The enzymatic transfer of hydrogen from alcohol to DPN Journal of the American Chemical Society 73 5 2403 doi 10 1021 ja01149a561 a b Westheimer F H December 1949 The Mechanisms of Chromic Acid Oxidations Chemical Reviews 45 3 419 451 doi 10 1021 cr60142a002 a b c Westheimer F H 1 June 1961 The Magnitude of the Primary Kinetic Isotope Effect for Compounds of Hydrogen and Deuterium Chemical Reviews 61 3 265 273 doi 10 1021 cr60211a004 a b The President s National Medal of Science Recipient Details Frank H Westheimer National Science Foundation Retrieved 9 March 2018 a b c d e f g h i j k l m n Gortler Leon 5 January 1979 Frank H Westheimer Transcript of an Interview Conducted by Leon Gortler at Harvard University on 4 and 5 January 1979 PDF Philadelphia PA Beckman Center for the History of Chemistry Hargittai Istvan September 2002 Candid Chemistry Chemistry International 24 5 Retrieved 6 March 2018 Kohler E P Westheimer F H Tishler M February 1936 Hydroxy Furans I Beta Hydroxy Triphenylfuran Journal of the American Chemical Society 58 2 264 267 doi 10 1021 ja01293a020 Chandler Medal to Frank Westheimer University Record Vol 6 no 10 Columbia University 7 November 1980 Retrieved 6 March 2018 a b Jensen Frank 2008 Introduction to computational chemistry Chichester Wiley ISBN 978 0 470 01186 7 Retrieved 6 March 2018 Saxe Robert L April 27 1954 Chemistry Dept Shapes Venture in Biochemistry Bloch Westheimer Named Professors The Harvard Crimson Retrieved 6 March 2018 a b c d e Pearce Jeremy April 21 2007 Frank Westheimer 95 Who Developed Model Valuable in Biochemistry Dies The New York Times Retrieved 6 March 2018 Hursthouse M B Moss G P Sales K D 1978 Chapter 3 Theoretical chemistry Applications of molecular mechanics calculations Annu Rep Prog Chem Sect B Org Chem 75 23 35 doi 10 1039 OC9787500023 Carroll Felix A 2010 Perspectives on structure and mechanism in organic chemistry 2nd ed Hoboken N J John Wiley p 135 ISBN 978 0470276105 Retrieved 8 March 2018 Fisher H F Conn E E Vennesland B Westheimer F H 1953 The Enzymatic Transfer of Hydrogen I The Reaction Catalyzed by Alcohol Dehydrogenase J Biol Chem 202 2 687 697 doi 10 1016 S0021 9258 18 66181 2 PMID 13061492 Loewus F A Ofner P Fisher H F Westheimer F H Vennesland B 1953 The Enzymatic Transfer of Hydrogen II The Reaction Catalyzed by Lactic Dehydrogenase J Biol Chem 202 2 699 704 doi 10 1016 S0021 9258 18 66182 4 PMID 13061493 a b Ault Addison September 2008 Frank Westheimer s Early Demonstration of Enzymatic Specificity Journal of Chemical Education 85 9 1246 Bibcode 2008JChEd 85 1246A doi 10 1021 ed085p1246 Citations for Chemical Breakthrough Awards Division of the History of Chemistry Retrieved 9 March 2018 Lassila Jonathan K Zalatan Jesse G Herschlag Daniel 7 July 2011 Biological Phosphoryl Transfer Reactions Understanding Mechanism and Catalysis Annual Review of Biochemistry 80 1 669 702 doi 10 1146 annurev biochem 060409 092741 PMC 3418923 PMID 21513457 a b Kohen Amnon Limbach Hans Heinrich 2006 Isotope effects in chemistry and biology Boca Raton Fla Taylor amp Francis ISBN 9780824724498 Retrieved 8 March 2018 Glad Sanne Schroder Jensen Frank January 1997 Kinetic Isotope Effects and Transition State Geometries A Theoretical Investigation of E2 Model Systems The Journal of Organic Chemistry 62 2 253 260 doi 10 1021 jo9618379 PMID 11671397 Agmon Noam 1985 Extensions of the Melander Westheimer Postulate Isotope Effects in Reactions with Equilibrium Values Far from Unity Israel Journal of Chemistry 26 4 375 377 doi 10 1002 ijch 198500122 Thompson J M T 2001 Visions of the future chemistry and life science Cambridge Massachusetts Cambridge University Press p 27 ISBN 978 0521805391 Retrieved 8 March 2018 Melander Lars 1960 Isotope Effects on Reaction Rates New York Ronald Press Wang Yong Kumar Devesh Yang Chuanlu Han Keli Shaik Sason July 2007 Theoretical Study of Demethylation of Substituted Dimethylanilines by Cytochrome P450 The Mechanistic Significance of Kinetic Isotope Effect Profiles The Journal of Physical Chemistry B 111 26 7700 7710 doi 10 1021 jp072347v PMID 17559261 Smith Ewan Collins Ian February 2015 Photoaffinity labeling in target and binding site identification Future Medicinal Chemistry 7 2 159 183 doi 10 4155 fmc 14 152 PMC 4413435 PMID 25686004 Singh A Thornton ER Westheimer FH September 1962 The photolysis of diazoacetylchymotrypsin The Journal of Biological Chemistry 237 9 3006 8 doi 10 1016 S0021 9258 18 60265 0 PMID 13913310 Retrieved 7 March 2018 Westheimer F H January 1968 Pseudo rotation in the hydrolysis of phosphate esters Accounts of Chemical Research 1 3 70 78 CiteSeerX 10 1 1 557 9702 doi 10 1021 ar50003a002 Retrieved 7 March 2018 Bethell D 1989 Advances in physical organic chemistry Vol 25 London Academic Press pp 122 139 ISBN 9780080581644 Retrieved 8 March 2018 Erdmann Volker A Markiewicz Wojciech T Barciszewski Jan 2014 Chemical Biology of Nucleic Acids Fundamentals and Clinical Applications Aufl 2014 ed Berlin Springer Verlag p 43 ISBN 9783642544514 Retrieved 8 March 2018 Why nature chose phosphates The Curious Waveform February 23 2009 Retrieved 9 March 2018 Westheimer FH 6 March 1987 Why nature chose phosphates Science 235 4793 1173 8 Bibcode 1987Sci 235 1173W doi 10 1126 science 2434996 PMID 2434996 Kamerlin Shina C L Sharma Pankaz K Prasad Ram B Warshel Arieh 2013 Why nature really chose phosphate Quarterly Reviews of Biophysics 46 1 1 132 doi 10 1017 S0033583512000157 PMC 7032660 PMID 23318152 Hunter T 13 August 2012 Why nature chose phosphate to modify proteins Philosophical Transactions of the Royal Society B Biological Sciences 367 1602 2513 2516 doi 10 1098 rstb 2012 0013 PMC 3415839 PMID 22889903 Reich Hans J Hondal Robert J 21 March 2016 Why Nature Chose Selenium ACS Chemical Biology 11 4 821 841 doi 10 1021 acschembio 6b00031 PMID 26949981 Frank H Westheimer National Academy of Sciences Retrieved 9 March 2018 APS Member History search amphilsoc org Retrieved 2022 07 20 Jews elected to foreign membership in the British Royal Society 1901 Present JInfo Retrieved 9 March 2018 Benner Steven Corey Elias J 2018 Frank Henry Westheimer 15 January 1912 14 April 2007 Biographical Memoirs of Fellows of the Royal Society doi 10 1098 rsbm 2018 0009 Laitinen Herbert A March 1966 Editorial The Westheimer Report Where is Analytical Chemistry Analytical Chemistry 38 3 369 doi 10 1021 ac60235a600 Westheimer Report Seeks Increase In Spending for Chemical Research The Harvard Crimson December 4 1965 Retrieved 9 March 2018 NAS Award in Chemical Sciences National Academy of Sciences Retrieved 9 March 2018 Welch Award in ChemistryPast Award Recipients The Welch Foundation Retrieved 9 March 2018 Golden Plate Awardees of the American Academy of Achievement www achievement org American Academy of Achievement Frank H Westheimer among winners of the National Medal of Science PDF UCSanDiego March 12 1986 Retrieved 9 March 2018 ACS 1988 National Award Winners Chemical amp Engineering News 65 35 48 1987 doi 10 1021 cen v065n035 p048 ISSN 0009 2347 Nakanishi Prize American Chemical Society Retrieved 9 March 2018 External links edit nbsp Wikiquote has quotations related to Frank Westheimer McLafferty Fred W Abruna Hector D A Conversation with Fred W McLafferty 2006 90 minute video for Cornell University Center for Oral History Frank H Westheimer Science History Institute Gortler Leon 5 January 1979 Frank H Westheimer Transcript of an Interview Conducted by Leon Gortler at Harvard University on 4 and 5 January 1979 PDF Philadelphia PA Beckman Center for the History of Chemistry Cromie William J October 3 2002 New chemistry medal is established Named for professor emeritus Frank Westheimer The Harvard Gazette Retrieved 6 March 2018 Obituaries edit Corey E J April 19 2007 Frank H Westheimer major figure in 20th century chemistry dies at 95 Harvard Gazette Retrieved 6 March 2018 Pearce Jeremy April 21 2007 Frank Westheimer 95 Who Developed Model Valuable in Biochemistry Dies The New York Times Wang Linda 23 April 2007 Frank Westheimer dies at 95 Chemical amp Engineering News 85 17 10 doi 10 1021 cen v085n017 p010 Retrieved from https en wikipedia org w index php title Frank Westheimer amp oldid 1192383830, wikipedia, wiki, book, books, library,

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