The reactivity of co-ordinated oxalate. Part V. Oxygen-18 exchange studies on the cis-diaquobisoxalatochromate(III) anion

Abstract

cis-Diaquobisoxalatochromate(III) anion exchanges all eight of its oxalate oxygen atoms with solvent water at the same rate in aqueous acid media at room temperature. Rates and Arrhenius parameters for this reaction are similar to those for the corresponding reaction of the trisoxalatochromate(III) anion.

Exchange of the co-ordinated water of both cis- and trans-isomers in aqueous solution is negligible for at least eight days in neutral and acid media at room temperature.