Synthesis and Characterization of 1-phenyl-3-methyl-4-stearoylpyrazol-5-one and Its Lanthanum(III) and Tungsten(VI) Complexes
A. I. C. Ehirim *
Department of Chemistry, School of Physical Sciences, Federal University of Technology, P.M.B. 1526, Owerri, Nigeria.
C. K. Enenebeaku
Department of Chemistry, School of Physical Sciences, Federal University of Technology, P.M.B. 1526, Owerri, Nigeria.
C. Asimole
Department of Chemistry, Alvan Ikoku Federal College of Education, P.M.B 1033, Owerri, Nigeria.
M. O. C. Ogwuegbu
Department of Chemistry, School of Physical Sciences, Federal University of Technology, P.M.B. 1526, Owerri, Nigeria.
E. N. O. Ejike
Department of Chemistry, School of Physical Sciences, Federal University of Technology, P.M.B. 1526, Owerri, Nigeria.
*Author to whom correspondence should be addressed.
Abstract
The ligand, 1-phenyl-3-methyl-4-stearoylpyrazol-5-one (HSPy), and its La(III) and W(VI) complexes were synthesized and characterized spectroscopically using elemental analysis, UV-visible, IR, 1H and 13C NMR. Physical properties such as colour, melting points, conductivity measurements and solubility profile were also investigated. La(III) and W(VI) reacted with the ligand in the metal-ligand mole ratios of 1:3 and 1:2 to form neutral complexes of diaquo-trischelate La(SPy)3.2H2O and dioxoaquo-bischelate, WO2(SPy)2.H2O respectively.
Keywords: 1-phenyl-3-methyl-4-stearoylpyrazol-5-one, synthesis, characterization, lanthanum(III), tungsten(VI), complexes