Variable Temperature Proton NMR Study and Reductively-induced Isomerisation and Degradation of [CpCr(CO)₂(SPh)]₂
Crystal structure of Cp₂Co[CpCr(SPh)₃]
The presence of two major (1A and IC) and one minor (1B) geometrical isomers of the complex [CpCr(CO)2(SPh)]2 (1) in CH2Cl2 has been observed in variable temperature NMR studies. A reversible one-electron reduction at -0.56 V, as well as a quasi-reversible reduction, attributed to IA and IC, respectively, have been observed in electrochemical studies. Bulk chemical reduction of 1 by cobaltocene led to the isolation of Cp2Co[CpCr(CO)3] (2) and Cp2Co[CpCr(SPh)3] (3) in ca. 30% yields each. The compound 3 has been studied by X-ray diffraction analysis. Crystal data: black prisms, monoclinic, space group P21/n (#14), a = 16.225(5) A, b = 10.576(3) A, c = 19.99(1) A, β = 113.49(4)°, Z = 4, V = 3147(5) A3.
L. Y. Goh et al., "Variable Temperature Proton NMR Study and Reductively-induced Isomerisation and Degradation of [CpCr(CO)₂(SPh)]₂," Journal of Organometallic Chemistry, Elsevier, Jan 1996.
The definitive version is available at http://dx.doi.org/10.1016/S0022-328X(96)06409-1
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