Metal Halide and Pseudohalide Complexes in Dimethylsulfoxide Solution. VII. Thermodynamics of Copper(I) Halide and Copper(II) Bromide Complex Formation.

Abstract

The Cu1+ ion, and its complexes, are strongly solvated by DMSO and therefore are fairly stable in this solvent. The thermodn. of Cu(I) halide complex formation was studied in DMSO in a medium of ionic strength 1 M, (NH4ClO4), at 25%. The stabilities of the 1st complexes, CuL, vary only slightly in the sequence Cl- > Br- < I-. For the second complex, the stabilities decrease in the order Cl- > Br- > I-. With I-, dinuclear species are presumably also formed. The formation of CuL is exothermic and increasingly so in the order of Cl- < Br-