Abstract
The metal substitution reaction of complexes was studied in the case of bis (dimethylglyoximato) metal complexes by means of electron impact mass spectrometry. The reaction schemes were described below,M(dgH)2 + NXn → N(dgH)2 + M2+ + nX-where M and N denote each of Ni, Cu and Pd, and dgH denotes dimethylglyoximato, and X- denotes each of Cl-, SO42-, NO3- and CH3COO-.In the case of bis (dimethylglyoximato) copper (II), Cu (dgH)2, the molecular ion could not be observed because of thermal decomposition, but in the cases of bis (dimethylglyoximato) nickel (II) and bis (dimethylglyoximato) palladium (II), the molecular ions could be detected easily. Metals of Ni (II) and Cu (II) of bis (dimethylglyoximato) nickel (II) and bis (dimethylglyoximato) copper (II), respectively, could also be replaced easily by metal Pd (II) of PdSO4. Using all PdXn salts, the metal Pd (II) coule be replaced easily by metal Ni (II) of bis (dimethylglyoximato) nickel (II). The strongest signal of Pd (dgH)2 could be obtained in the ease of sulfate and the weakest signal could be obtained in the case of nitrate. Reaction step of metal substitution may involve the existence of Pd (dgH)2 in the solid phase.
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