| 词条 | Nitropentaamminecobalt(III) chloride |
| 释义 |
| ImageFile2 = Nitropentaamminecobalt(III) chloride.png | ImageFile1 = Nitropentaamminecobalt(III) Chloride.jpg | IUPACName = | OtherNames = |Section1={{Chembox Identifiers | CASNo =13782-02-0 | PubChem = | SMILES = }} |Section2={{Chembox Properties | Formula =H15N6O2Cl2Co | MolarMass =261.00 g/mol | Appearance = | Density =1.83 g/mL[1] | MeltingPt = | BoilingPt = | Solubility = }} |Section3={{Chembox Hazards | MainHazards = | EUClass = {{Hazchem Xi}} | FlashPt = | AutoignitionPt = }} }} Nitropentaamminecobalt(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 coordination complex [Co(NH3)5(NO2)]2+. Linkage isomers[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] Preparation and reactionsNitritopentaamminecobalt(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.[5] 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. References1. ^{{cite journal|author1=Grenthe, I |author2=Nordin, E. |title=Nitrito-Nitro Linkage Isomerization in the Solid State. 2. A Comparative Study of the Structures of Nitrito- and Nitropentaamminecobalt( 111) Dichloride |journal=Inorganic Chemistry|volume=18|year=1979|pages=1869–74|doi =10.1021/ic50197a031|issue= 7}} 2. ^{{cite journal|author=Hohman, W. H. |title= A Combined Infrared and Kinetic Study of Linkage Isomers. An Inorganic Experiment |journal=Journal of Chemical Education|volume=51|year=1974|pages=553|doi =10.1021/ed051p553|issue= 8}} 3. ^{{cite journal|author1=Brasted, R. |author2=Hirayama, C. |title=An Examination of the Absorption Spectra of Some Cobalt(III)-Amine Complexes. Effect of Ligand and Solvents in Absorption |journal=J. Phys. Chem.|volume=63|year=1959|pages=780–6|doi =10.1021/j150576a003|issue= 6}} 4. ^{{cite journal|author1=Penland, R. |author2=Lane, T. |author3=Quagliano, J. |title=Infrared Absorption Spectra of Inorganic Coordination Complexes. VII. Structural Isomerism of Nitro- and Nitritopentaamminecobalt(III) Chlorides |journal=Journal of the American Chemical Society|volume=78|year=1956|pages=887–9|doi =10.1021/ja01586a001|issue= 5}} 5. ^{{cite journal|author1=Crawford, B. |author2=Talburt, D. |author3=Johnson, D. |title=Effects of Cobalt(III) Complexes on Growth and Metabolism of Escherichia coli|journal=Bioinorganic Chemistry|volume=3|year=1974|pages=121–33|doi =10.1016/S0006-3061(00)80035-6|issue= 2}} 2 : Cobalt complexes|Ammine complexes |
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