Synthesis and Characterization of Some New Binuclear Complexes of Schiff Base as a Dibasic Tetradentate Ligand

Abstract

A dibasic tetradentate Schiff base ligand; 2,5-bis(o-hydroxyphenylimino)hexane, (H2L),
and their new binuclear complexes have been synthesized and characterized on the basis of
analytical, spectral, magnetic and conductance measurements. The compositions of these
complexes were found to be [(M)2(L)2(H2O)4] (where M = Co(II) or Cu(II)) ;
[(Zn)2(L)2].2H2O ; and [(Ni)2(L)2].14H2O (in molar ratio of 2:2 as metal : ligand) ; also
[(M)2(L)(Cl)2)(H2O)2] (where M =Co(II), Ni(II), Cu(II) or Zn(II) (in molar ratio of 2:1 as
metal : ligand). The overall IR data suggest the dibasic, tetradentate (N2O2) nature of the
ligand. The decomposition degrees and insolubility in common organic solvents support the
binuclear structure of these complexes. Conductance measurements show a non electrolytic
nature of the complexes.