Octahedral cobalt(III) complexes in dipolar aprotic solvents. VIII. The solvolysis of cis- and trans-[CoBr2 en2]+ ions in anhydrous dimethyl sulphoxideand mixtures of anhydrous dimethyl sulphoxide and NN-dimethylacetamide

Abstract

The solvolysis reactions (see diagram in article) have been studied in anhydrous dimethyl sulphoxide (DMSO) over a range of bromide concentrations and at various mole fractions of DMSO in NN-dimethyl-acetamide (DMA). The solvolysis of both isomers results in nearly complete removal of first bromide in pure DMSO while in DMA almost insignificant solvolysis occurs. The influence of ion association on the measured rates is discussed. Activation energies are presented for all reactions.