7086 tion was poured into 30 ml of water, yielding yellow crystals of the deuterated complex. These were collected by filtration, washed with water, and dried in a vacuum desiccator. The nmr spectrum of the complex in CDC13 revealed the presence of the dimethylglyoxime methyl protons but was free of signals due to undeuterated fl-cyanoethyl(pyridine)cobaloxime. No incorporationof deuterium was observed under similar conditionsat pH
