63 Cu and 109Ag NMR studies of copper(I) and silver(I) salts in mixed solvents containing nitriles

The solvation of copper(I) in mixed solvent systems containing acetonitrile or benzonitrile and the co-solvents propionitrile, butyronitrile, valeronitrile, as well as trimethyl-, triethyl- and tributyl-phosphite has been examined by 63Cu NMR and also, in the case of the phosphites, by 31P NMR. The concentration dependence and the variation of the chemical shift of the silver-109 signal with solvent composition have been studied in solutions of silver trifluoroacetate (AgO2CCF3).