Homogeneous precipitation of palladium dimethylglyoximate by interchange reactions of CN groups

Abstract

The formation of palladium dimethylglyoximate by homogeneous precipitation between pH 1 and 2 is described using several iminic derivatives of diacetylmonoxime (hydrazone and semicarbazone), by reaction with an excess of hydroxylamine. Kinetic studies of the interchange of >CN—groups were also carried out. Quantitative precipitation of palladium(II) is useful for the gravimetric determination of micro-amounts of the metal with excellent results. It is shown that the physico-chemical properties of the precipitate are more advantageous than those shown by the precipitate obtained by the conventional method using dimethylglyoxime.