Polymetallic Complexes Part 91 Dimeric and Monomeric Complexes of Co^II, Ni^II, Cu^II, Zn^II, Cd^II and Hg^II with N∩O-O∩N and N∩O Donor Bis-bidentate and Bi-dentate Azodye Ligands

Abstract

Bis-bidentate azodye, 4,4 ^/ -bis (4^/ -dihydroxyquinolincazo)3,3^/ -dimethoxydibenzene having N∩O-O∩N donors and bidentate azodye (4 -hyoxyquinolineazo)4^/ methoxybenzene having N∩O donors form dimeric and monomeric complexes of the type [M₂LCl₂(H₂O)₆], [M^/₂LCl₂(H₂O)₂], [ML^/₂(H₂O)₂] and [M^/L^/₂] where M = Co^II, Ni^II, Cu^II; M ^/II, Cd^II, Hg^II. The complexes of the first and third categories are found to be six-coordinated with an octahedral and distorted octahedral configuration and the complexes of second and fourth type are four-coordinated with a tetrahedral geometry around the metal ions. The complexes have been characterised based upon analytical, conductance, magnetic susceptibility, i.r., electronic spectra, N.M.R., E.S.R. and X-ray diffraction data. The unit cell parameters like a, b, c, α, ß, γ and V (volume) have been calculated from the 2θ values. The unit cell geometry of the complex [Co₂LCl₂(H₂O)₆] is found to be monoclinic.

Key words: Polymetallic complexes; Azodye complexes; Multidentate ligands.

DOI: http://dx.doi.org/10.3329/bjsir.v46i2.3558

Bangladesh J. Sci. Ind. Res. 46(2), 259-264, 2011