Reactions of co-ordinated nucleophiles. Preparation, characterization, and crystal structure of penta-ammine(phenylthiocarbamato-S)cobalt-(III) perchlorate monohydrate

Autor:	Robert J. Balahura, Lynda Ecott, George Ferguson, Pik Yuen Siew
Rok vydání:	1982
Předmět:	chemistry.chemical_compound Perchlorate Crystallography chemistry Nucleophile Hydrogen bond Dimethylformamide Molecule Orthorhombic crystal system General Chemistry Crystal structure Hydrate
Zdroj:	Journal of the Chemical Society, Dalton Transactions. :747
ISSN:	1364-5447 0300-9246
DOI:	10.1039/dt9820000747
Popis:	The title complex [Co(NH3)5(SCONHPh)][ClO4]2 has been prepared by the addition of [Co(NH3)5(OH2)]-[ ClO4]3 to phenyl isothiocyanate in dimethylformamide. A mechanism for formation of the complex is proposed whereby an O-bonded complex is initially formed and then isomerizes rapidly to the stable S-bonded species. The stable complex has been characterized by spectroscopic methods and by X-ray crystallography. Crystals are orthorhombic, space group Pnam, with eight molecules of the hydrate, [Co(NH3)5(SCONHC6H5)][ClO4]2·H2O, in a unit cell of dimensions a = 9.573(5), b= 11.300(5), and c= 37.40(2)A. The structure was refined by full-matrix least-squares calculations to a final R value of 0.096 for 660 ‘ observed ’ reflections. The Co atom is octahedrally co-ordinated [Co–N 1.98–2.02(3), Co–S 2.264(9)A]. An extensive network of hydrogen bonds links the cations, anions, and water molecules.
Databáze:	OpenAIRE
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