Preparation and investigations of some homobinuclear mixed ligands complexes derived from bidentate ligands

Abstract EN

Mixed ligand complexes of the type [(M)2LL′ (OH)2(H2O)4] (where M = Co(II), Ni(II), Cu(II) or Zn(II) ; L = biacetyl ; while L′ = deprotonated ethylene glycol) have been synthesized by 2:1:1 molar reactions of metal salts with biacetyl and ethylene glycol.

Also [(M)2L1L2(OH)4(H2O)2] complexes (where M = Co(II), Ni(II), Cu(II) or Zn(II) ; L1 = biacetyl ; while L2 = ethylenediamine) have been synthesized by 2:1:1 molar reactions of metal salts with biacetyl and ethylenediamine.

The resulting complexes have been characterized by the metal content measurements, molar conductance measurements, infrared, electronic spectra and magnetic moment measurements.

The complexes are non-electrolytes as is evident from low values of their molar conductance.

The infrared spectral studies of the complexes indicate that the ligands behave as bidentate chelating ligands.

Also the IR studies show that the water molecules are coordinated in all the complexes and the metal centres are bridged by (OH) groups.

Also (OH) group is coordinated to each metal ion in the [(M)2L1L2(OH)4(H2O)2].

The different studies reveal dinuclear nature of all the complexes and the two metal atoms are hexacoordianted with octahedral geometry.