Nickel [ll] and copper [ll] chelates of 1,2 diphenyl-1-oximino-2-n- [o-aminophenylaldimino] -ethanediylene and their reaction with acetylacetone and isonitrosoacetylacetone

ABSTRACT

Condensation of a-benzilmonoxime with o-phenylenediamine forms 1,2-dipherryl-1-oximino-2-N-[o-aminophenylafdimino]-ethanediyiene. Nickel [II] and copper [II] complexes of this imine-oxime are characterized. Linkage-isomerization of N- and O-oximato is explored. Phenyl side groups hinder impact of surroundings. In the acetate derivatives, the imine-oxime is deprotonated, and mass spectra exhibit base lines of dimers. O-oximato holds nickel [ln acetate dieter, while acetate links that of copper [Il]. Infrared spectra, magnetic and electrochemical behaviors support the dimerization- b-diketone such as acetyl-acetone or isonitrosoacetylacetone substitutes the acetate group. Replacement of the bridging acetate of the copper [II] chelate is accompanied by condensation between the carbonyl of diketonate and the amino group. Correlations between infrared frequencies and reduction potentials are used to identify the redox species. Unlike Ni[II]-chelates, -electron delocalization are expected within the ligand of the Cu[II]-chelates