PALLADIUM(II) AND PLATINUM(II) COMPLEXES OF 5-ACYL AND 5-ALKYLAMINO-1,2-BENZOQUINONE-2-OXIMES

Reaction of palladium(II) chloride and potassium tetrechloroplatinate( II) with 5-acylamino and 5-alkylamino-1,2-benzoquinone-2-oximes (qOH; I) has led to complexes of the type M(qo)(2) (2). Pd(qo)(2) was also o btained by the nitrosation of the appropriate phenol in the presence o f palladium(II) chloride. The complexes were characterised by elementa l analysis, IR and NMR (H-1,Pt-195) spectroscopy. These studies indica ted that the ligands are bonded to the metals via the oxime nitrogen a nd the quinonoid carbonyl oxygen, while mass spectral analysis indicat ed that the complexes were monomeric. The complexes failed to react wi th 2,2-dipyridyl, pyridine, and dimethyl acetylenedicarboxylate though the palladium complex, Pd(5-Acqo)(2), reacted with triphenylphosphine to give the corresponding iminophosphoranyl complex. Copyright (C) 19 96 Elsevier Science Ltd