Preparation and Investigations of Some Homobinuclear Mixed Ligands Complexes Derived From Bidentate Ligands

الملخص

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.