ON THE FORMATION OF NI(II)-ANTHRANILIC ACID ANILIDE COMPLEXES

The preparation and spectral properties are reported for a series of nine anthranilic acid· anilide Iigand-Ni(lI) complexes. The coordination of the ligands has been demonstrated by ir and electronic spectra. The results indicate octahedral geometlY around Ni(II) ion, where EtOH molecule occupy bridged poSitions which lead to dimeric structure. The formation CUlVes and consequently the stability constants of the complexes in 50% dioxane are determined by potentiometric techniques. The values of the stability constants depend on molecular structure. Deviation of the (T-*.Iog K plots slopes from unity is attributed mainly to steric effects, 'lI"-electron back donation from the metal ion or structural changes in the ligand.

M A EL BEHAIRY ,A A SALEH ,S M A EL WAFA ,