Relating Cation Solvation in Solvent Mixtures with Solvent Exchange Rates — A ¹H‐NMR Study on Co(II)‐Ions

Abstract

Specific and statistical solvation of Co(II)‐ions in mixtures of methanol with dimethylformamide respectively hexamethylphosphoric triamide was found by 1H‐NMR‐spectroscopy. Relations are given, which correlate these possible solvation models with the kinetics of solvent exchange. On this basis, specific outersphere solvation of the methanol rich Co(II)‐solvate‐complexes by dimethylformamide can be deduced. For mixtures of hexamethylphosphoric triamide with methanol, the statistical solvation behaviour is additionally favoured by a strong solvent‐solvent interaction.