PROMOTING ACCESS TO AFRICAN RESEARCH

Bulletin of the Chemical Society of Ethiopia

Log in or Register to get access to full text downloads.

Remember me or Register



Studies on some VO(IV), Ni(II) and Cu(II) complexes of non-symmetrical tetradentate Schiff-bases

Aderoju A. Osowole

Abstract


The coordination chemistry of VO(IV), Ni(II) and Cu(II) with unsymmetrical Schiff base ligands, [HO(OCH3)C6H3C(CH3):N(CH2CH2)N:C(CH3)CH:C(C6H5)OH], H2L and [HO(OCH3)C6H3C(CH3):N(CH2CH2)N:C(CH3)CH:C(CH3)OH], H2L1 (derived from condensation of 1-phenyl-1,3-butanedione/2,4-pentanedione, ethylenediamine and 5-methoxy-2-hydroxy acetophenone) is discussed. The metal complexes were characterized by elemental analysis, molar conductance, magnetic susceptibility, infrared and electronic spectral measurements. They are magnetically dilute, non-electrolytes in nitromethane. The ligands are tetradentately coordinating via the imine N and enolic O atoms, resulting in 5-coordinate square-pyramidal geometry for the VO(IV) complexes and 4-coordinate square-planar geometry for the Ni(II) and Cu(II) complexes. The assignment of geometry is supported by magnetic and spectral measurements.

 

KEY WORDS: Coordination chemistry, Magnetically dilute, Non-electrolyte, Non-symmetrical Schiff base

 

 

Bull. Chem. Soc. Ethiop. 2008, 22(2), 219-224.




http://dx.doi.org/10.4314/bcse.v22i2.61288
AJOL African Journals Online