It was first reported in 1931.[2] Of the several ways to produce this compound,[3] is the protonation of the pentacarbonyl manganate anion. The latter is formed from reduction of dimanganese decacarbonyl, e.g., with superhydride:
The structure of HMn(CO)5 has been studied by many methods including X-ray diffraction, neutron diffraction, and electron diffraction.[5] HMn(CO)5 can be related to the structure of a hexacarbonyl complex such as Mn(CO)+ 6, and therefore has similar properties.[6] The compound has octahedral symmetry[7] and its molecular point group is C4v.[5] The H-Mn bond length is 1.44 ± 0.03 Å.[5] Gas phase electron diffraction analysis confirms these conclusions.
Main reactionsedit
The pKa of HMn(CO)5 in water is 7.1.[8] It is thus comparable to hydrogen sulfide, a common inorganic acid, in its acidity.
A common reaction involving HMn(CO)5 is substitution of the CO ligands by organophosphines, as occurs both thermally and photochemically. In this way the many derivatives form of the type HMn(CO)5-x(PR3)x.[9] (R here need not be a purely hydrocarbon component; it may, for instance, be OEt, where Et = ethyl group.)
HMn(CO)5 can be used to reduce olefins and other organic compounds, as well as metal halides.[3]
^Hieber, W. Leutert, F. Naturwissenschaften. 1931. 360.
^ abcHunter, Alan D; Bianconi, Larry J; DiMuzio, Steven J; Braho, Dianne L. Synthesis and Structure- Property Relationships in η6-Arene) Cr(CO)3 Chemistry: From Guided Experiments to Discovery Research. J. Chem. Educ. 75. 1998. 891. doi:10.1021/ed075p891
^Finn, M.G. Pentacarbonyl(trimethylsilyl)manganese. Encyclopedia of Reagents for Organic Synthesis. doi:10.1002/047084289X.rp022s
^ abcKukolich, S.G. Microwave Spectrum and Molecular Structure for Manganese Pentacarbonyl Hydride. 33. 1994. 1217-1219
^Fenske, Richard. Electronic Structure and Bonding in Manganese Pentacarbonyl Halides and Hydride. Inorganic Chemistry. 9. 1970. 1053-1060.
^Liu, Xian-mei; Wang, Chao-yang; Qian-shu; Xie; Yaoming; King, R. Bruce; Schaefer, Henry F., III. Mononuclear and binuclear manganese carbonyl hydrides. Dalton Trans., 2009, 3774-3785, doi:10.1039/b822913a
^Morris, Robert H. (2016-08-10). "Brønsted–Lowry Acid Strength of Metal Hydride and Dihydrogen Complexes". Chemical Reviews. 116 (15): 8588–8654. doi:10.1021/acs.chemrev.5b00695. hdl:1807/78047. ISSN 0009-2665. PMID 26963836.
pentacarbonylhydridomanganese, organometallic, compound, with, formula, this, compound, most, stable, first, transition, metal, hydrides, names, other, names, hydrogen, pentacarbonylmanganate, manganese, pentacarbonylhydro, hydridomanganese, pentacarbonyl, hyd. Pentacarbonylhydridomanganese is an organometallic compound with formula HMn CO 5 This compound is one of the most stable first row transition metal hydrides Pentacarbonylhydridomanganese Names Other names Hydrogen pentacarbonylmanganate I 7CI Manganese pentacarbonylhydro 8CI Hydridomanganese pentacarbonyl Hydridopentacarbonylmanganese Manganese pentacarbonyl hydride Pentacarbonylhydromanganese Pentacarbonylmanganese hydride Identifiers CAS Number 16972 33 1 Y 3D model JSmol Interactive image ChemSpider 25945809 PubChem CID 139143359 InChI InChI 1S 5CO Mn H c5 1 2 Key SKOPWNLHPUYPLV UHFFFAOYSA N SMILES O C MnH C O C O C O C O Properties Chemical formula HMn CO 5 Molar mass 195 99799 g mol Appearance At room temperature it is liquid and colorless Below its melting point it may be sublimed in vacuum 1 Acidity pKa 7 1 Except where otherwise noted data are given for materials in their standard state at 25 C 77 F 100 kPa Y verify what is Y N Infobox references Contents 1 Preparation 2 Structure and properties 3 Main reactions 4 Notes 5 ReferencesPreparation editIt was first reported in 1931 2 Of the several ways to produce this compound 3 is the protonation of the pentacarbonyl manganate anion The latter is formed from reduction of dimanganese decacarbonyl e g with superhydride 2 LiHB C2H5 3 Mn2 CO 10 2 LiMn CO 5 H2 2 B C2H5 3 Li Mn CO 5 CF3SO3H HMn CO 5 CF3SO3Li Salts of Mn CO 5 can be isolated as crystalline PPN m nitrido bis triphenylphosphorus salt which is smoothly protonated by CF3 SO3 H 3 PPN Mn CO 5 CF3 SO3 H HMn CO 5 PPN CF3 SO 3 This compound can also be formed by the hydrolysis of pentacarbonyl trimethylsilyl manganese 4 CO 5MnSiMe3 H2O HMn CO 5 Me3SiOH Me CH3 Structure and properties editThe structure of HMn CO 5 has been studied by many methods including X ray diffraction neutron diffraction and electron diffraction 5 HMn CO 5 can be related to the structure of a hexacarbonyl complex such as Mn CO 6 and therefore has similar properties 6 The compound has octahedral symmetry 7 and its molecular point group is C4v 5 The H Mn bond length is 1 44 0 03 A 5 Gas phase electron diffraction analysis confirms these conclusions Main reactions editThe pKa of HMn CO 5 in water is 7 1 8 It is thus comparable to hydrogen sulfide a common inorganic acid in its acidity A common reaction involving HMn CO 5 is substitution of the CO ligands by organophosphines as occurs both thermally and photochemically In this way the many derivatives form of the type HMn CO 5 x PR3 x 9 R here need not be a purely hydrocarbon component it may for instance be OEt where Et ethyl group HMn CO 5 can be used to reduce olefins and other organic compounds as well as metal halides 3 It can be methylated with diazomethane 1 HMn CO 5 CH2N2 Mn CO 5CH3 N2Notes editReferences edit a b Eley D D Pines Herman Weisz P B Advances In Catalysis 32 385 ISBN 978 0 12 007832 5 Hieber W Leutert F Naturwissenschaften 1931 360 a b c Hunter Alan D Bianconi Larry J DiMuzio Steven J Braho Dianne L Synthesis and Structure Property Relationships in h6 Arene Cr CO 3 Chemistry From Guided Experiments to Discovery Research J Chem Educ 75 1998 891 doi 10 1021 ed075p891 Finn M G Pentacarbonyl trimethylsilyl manganese Encyclopedia of Reagents for Organic Synthesis doi 10 1002 047084289X rp022s a b c Kukolich S G Microwave Spectrum and Molecular Structure for Manganese Pentacarbonyl Hydride 33 1994 1217 1219 Fenske Richard Electronic Structure and Bonding in Manganese Pentacarbonyl Halides and Hydride Inorganic Chemistry 9 1970 1053 1060 Liu Xian mei Wang Chao yang Qian shu Xie Yaoming King R Bruce Schaefer Henry F III Mononuclear and binuclear manganese carbonyl hydrides Dalton Trans 2009 3774 3785 doi 10 1039 b822913a Morris Robert H 2016 08 10 Bronsted Lowry Acid Strength of Metal Hydride and Dihydrogen Complexes Chemical Reviews 116 15 8588 8654 doi 10 1021 acs chemrev 5b00695 hdl 1807 78047 ISSN 0009 2665 PMID 26963836 Albertin Gabriele Cationic Molecular Hydrogen Complexes of Mn I Organometallics 16 1997 4959 4969 Retrieved from https en wikipedia org w index php title Pentacarbonylhydridomanganese amp oldid 1219088048, wikipedia, wiki, book, books, library,
