Pentaamminenitritocobalt(III) chloride is an inorganic compound with the molecular formula [Co(NH3)5(NO2)]Cl2. It is an orange solid that is soluble in water. Although it has no applications, the compound has been of academic interest as a source of the transition metal nitrite complex [Co(NH3)5(NO2)]2+.
The coordination complexes [Co(NH3)5(NO2)]2+ and [Co(NH3)5(ONO)]2+ provided an early example of linkage isomerism. This nitritopentaamminecobalt(III) isomer converts to the more stable nitro form at room temperature.[2] The two isomers can be distinguished by UV-Vis spectroscopy. Absorbance maxima for the nitro isomer occur at 457.5, 325, and 239 nm. The nitrito has maxima at 486, 330, and 220 nm.[3] Their IR spectra also differ. The nitrito isomer absorbs at 1460 and 1065 cm−1. The nitro isomer absorbs at 1430 and 825 cm−1.[4] The O-linkage isomer scrambles rapidly between the two oxygen sites, i.e. Co-O*NO/Co-ONO*.[5]
Heating a solution of the nitrito complex gives the nitro isomer.
Nitropentaamminecobalt(III) chloride has been studied for its ability to repress cell division.[6] This property has been tested to inhibit the growth of tumors and bacteria such as E. coli. However, it has been found that several other compounds are superior inhibitors.
Referencesedit
^Grenthe, I; Nordin, E. (1979). "Nitrito-Nitro Linkage Isomerization in the Solid State. 2. A Comparative Study of the Structures of Nitrito- and Nitropentaamminecobalt( 111) Dichloride". Inorganic Chemistry. 18 (7): 1869–74. doi:10.1021/ic50197a031.
^Hohman, W. H. (1974). "A Combined Infrared and Kinetic Study of Linkage Isomers. An Inorganic Experiment". Journal of Chemical Education. 51 (8): 553. Bibcode:1974JChEd..51..553H. doi:10.1021/ed051p553.
^Brasted, R.; Hirayama, C. (1959). "An Examination of the Absorption Spectra of Some Cobalt(III)-Amine Complexes. Effect of Ligand and Solvents in Absorption". J. Phys. Chem.63 (6): 780–6. doi:10.1021/j150576a003.
^Penland, R.; Lane, T.; Quagliano, J. (1956). "Infrared Absorption Spectra of Inorganic Coordination Complexes. VII. Structural Isomerism of Nitro- and Nitritopentaamminecobalt(III) Chlorides". Journal of the American Chemical Society. 78 (5): 887–9. doi:10.1021/ja01586a001.
^Crawford, B.; Talburt, D.; Johnson, D. (1974). "Effects of Cobalt(III) Complexes on Growth and Metabolism of Escherichia coli". Bioinorganic Chemistry. 3 (2): 121–33. doi:10.1016/S0006-3061(00)80035-6. PMID 4613388.
January 01, 1970
pentaamminenitritocobalt, chloride, inorganic, compound, with, molecular, formula, orange, solid, that, soluble, water, although, applications, compound, been, academic, interest, source, transition, metal, nitrite, complex, identifiers, number, 13782, model, . Pentaamminenitritocobalt III chloride is an inorganic compound with the molecular formula Co NH3 5 NO2 Cl2 It is an orange solid that is soluble in water Although it has no applications the compound has been of academic interest as a source of the transition metal nitrite complex Co NH3 5 NO2 2 Pentaamminenitritocobalt III chloride Identifiers CAS Number 13782 02 0 3D model JSmol Interactive image PubChem CID 414190 InChI InChI 1S 2ClH Co NO2 5H3N c 2 1 3 h2 1H 5 1H3 q 2 p 2Key XDIZJFSXOMJOOS UHFFFAOYSA L SMILES Cl Cl O N O Co 2 NH3 NH3 NH3 NH3 NH3 Properties Chemical formula H15N6O2Cl2Co Molar mass 261 00 g mol Density 1 83 g mL 1 Except where otherwise noted data are given for materials in their standard state at 25 C 77 F 100 kPa Infobox referencesLinkage isomers editThe coordination complexes Co NH3 5 NO2 2 and Co NH3 5 ONO 2 provided an early example of linkage isomerism This nitritopentaamminecobalt III isomer converts to the more stable nitro form at room temperature 2 The two isomers can be distinguished by UV Vis spectroscopy Absorbance maxima for the nitro isomer occur at 457 5 325 and 239 nm The nitrito has maxima at 486 330 and 220 nm 3 Their IR spectra also differ The nitrito isomer absorbs at 1460 and 1065 cm 1 The nitro isomer absorbs at 1430 and 825 cm 1 4 The O linkage isomer scrambles rapidly between the two oxygen sites i e Co O NO Co ONO 5 Preparation and reactions editNitritopentaamminecobalt III chloride is prepared by treating chloropentamminecobalt chloride with sodium nitrite Co NH3 5Cl 2 NO2 Co NH3 5 ONO 2 Cl Heating a solution of the nitrito complex gives the nitro isomer Nitropentaamminecobalt III chloride has been studied for its ability to repress cell division 6 This property has been tested to inhibit the growth of tumors and bacteria such as E coli However it has been found that several other compounds are superior inhibitors References edit Grenthe I Nordin E 1979 Nitrito Nitro Linkage Isomerization in the Solid State 2 A Comparative Study of the Structures of Nitrito and Nitropentaamminecobalt 111 Dichloride Inorganic Chemistry 18 7 1869 74 doi 10 1021 ic50197a031 Hohman W H 1974 A Combined Infrared and Kinetic Study of Linkage Isomers An Inorganic Experiment Journal of Chemical Education 51 8 553 Bibcode 1974JChEd 51 553H doi 10 1021 ed051p553 Brasted R Hirayama C 1959 An Examination of the Absorption Spectra of Some Cobalt III Amine Complexes Effect of Ligand and Solvents in Absorption J Phys Chem 63 6 780 6 doi 10 1021 j150576a003 Penland R Lane T Quagliano J 1956 Infrared Absorption Spectra of Inorganic Coordination Complexes VII Structural Isomerism of Nitro and Nitritopentaamminecobalt III Chlorides Journal of the American Chemical Society 78 5 887 9 doi 10 1021 ja01586a001 Jackson W G 1988 Oxygen scrambling in pentaamminenitritocobalt III revisited Inorganica Chimica Acta 149 101 104 doi 10 1016 S0020 1693 00 90574 7 Crawford B Talburt D Johnson D 1974 Effects of Cobalt III Complexes on Growth and Metabolism of Escherichia coli Bioinorganic Chemistry 3 2 121 33 doi 10 1016 S0006 3061 00 80035 6 PMID 4613388 Retrieved from https en wikipedia org w index php title Pentaamminenitritocobalt III chloride amp oldid 1214343878, wikipedia, wiki, book, books, library,
