Synthesis and Characterization of Binuclear Complexes of Oxovanadium(IV), Oxozirconium(IV), Dioxouranium(VI) and Thorium(IV) with N,N′-bis[(1E,2E)-2-(Hydroxyimino)-1-phenylethylidine]biphenyl-4,4′-diamine

In the present work, the synthesis of oxovanadium(IV), oxozirconium(IV), dioxouranium(VI) and thorium(IV) coordination compounds of tetradentate nitrogen donor ligand N,N'-bis[(1E.2E)-2-(hydroxyimino)-1-phenyl-ethylidine]biphenyl-4,4'-diamine is described. Their structures were determined on the basis of elemental analysis, molar conductance, magnetic susceptibility, electronic and thermal analysis, H-1 NMR and IR spectra. Based on analytical and molar conductance data it is revealing that the ligand (L) is coordinated in (N-4) fashion. The complex may be formulated as [VOL](2), [ZrL(H2O)](2), [UOL(H2O)(2)](2) and (ThL(NO3)(2)(H2O)(2)](2). The result indicates that the VO(IV) complex is square pyramidal; ZrO(IV) is hexacoordinate where as UO2 (VI) is 8-coordinated and Th(IV) is 10-coordinated complex.