Binuclear Complexes of Nickel(II) with the ligand 1,2,5,6-tetraphenyl-3,4-diaza-1,6-dihydrxyimino-2,4-hexadine

Abstract

Binuclear complexes of Ni(II) with the ligand 1,2,5,6-tetraphenyl-3,4-diaza-1,6-dihydroxyimino-2,4-hexadiene of the type Ni₂L₂X₄ where X = Cl^–, Br^–, I^– or NO₃^– have been isolated. Vibrational spectra suggest co-ordination of the ligand with the metal ions through the azine and oxime nitrogen atoms in a bi-bidentate manner. The complexes are suggested to possess a hydrogen bonded binuclear structure on the basis of IR data. Magnetic data and electronic spectra reveal a tetragonal crystal field around metal ions.