Abstract
Abstract Nickel(II) and copper(II) chlorides react with an excess of cystamine in ethanol to give the bis(cystamine)nickel(II) and copper(II) chlorides which appear to have distorted octahedral and tetragonal symmetry, respectively, on the basis of the IR, Raman and reflectance spectra. In aqueous solution, the metal-S(disulphide) interaction promotes the nucleophilic scission of the sulphur-sulphur bond. In the case of the copper-catalysed reaction, partial reduction of the metal centre occurs. With nickel(II), the reaction leads to the formation of trans-[Ni(SCH2CH2CH2)2] which has been characterized by single-crystal X-ray diffraction.
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