Abstract
The anation reactions: trans[Co(DH) 2NO 2DMSO] + X − = [Co(DH) 2(NO 2)X] − + DMSO have been studied for X − = Br − and SCN − in the solvent dimethyl sulphoxide (DMSO). These rates are compared with the DMSO exchange rate measured by pmr spectroscopy. The results are interpreted in terms of a limiting dissociative mechanism and this is supported by a study of the solvolysis reaction: trans-[Co(DH) 2NO 2Br] − + DMSO = trans-[Co(DH) 2NO 2DMSO] + Br − the mechanism of which is confirmed using solvent transfer activity data in comparing the analogous hydrolysis reaction.
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