Solvation of copper(I) perchlorate in mixed solvent systems containing acetonitrile. A 63Cu, 65Cu and 31P nuclear magnetic resonance study

Abstract

Copper(I) solvation in mixed solvent systems containing acetonitrile (AN) and co-solvents water (W), methanol (ME), dimethylformamide (DMF), trimethyl phosphate (TMPA), trimethyl phosphite (TMP) or pyridine (PY) have been studied using ⁶³Cu, ⁶⁵Cu and ³¹P NMR. Evidence for preferential solvation by AN is given for the first four systems whereas the latter two are characterized by strong preferential solvation of the copper(I) ion by the co-solvent. From the linewidths of the ⁶³Cu and ⁶⁵Cu signals the rotational correlation times τ_R of the solvates Cu(AN)⁺₄ and Cu(PY)⁺₄ have been determined.