Spectral Characterization of Co(II), Ni (II) and Cu (II) complexes with 5-(4-Chlorophenyl)-3-(2-naphthyl)- 1-phenyl-4,5-dihydro-1H-pyrazole

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Spectral Characterization of Co(II), Ni (II) and Cu (II) complexes with 5-(4-Chlorophenyl)-3-(2-naphthyl)- 1-phenyl-4,5-dihydro-1H-pyrazole

K. M. Khalifa¹, G. A. El-Alttif¹, M. A. Aboubaker¹ and A. M. Jarbou²

¹Chemistry Department, Science Faculty, Sebha University, Sebha (Libya) ²Chemistry Department, Science Faculty, Garyounis University, Benghazi (Libya)

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ABSTRACT:

The Co(II), Ni(II) and Cu(II) complexes of 5-(4-Chlorophenyl)-3-(2-naphthyl)-1-phenyl-4,5- dihydro-1H-pyrazole were synthesized and characterized by elemental analysis, molar conductivity, infrared and electron paramagnetic resonance spectroscopies. The analytical data suggested the stoichiometric of 1:1 and 1:2 [M:L] ratios. From the infrared spectra, it is concluded that the ligand is coordinated to the metal ions through nitrogen atoms of the ligand. The electron paramagnetic resonance spectral data suggested a square planar structure for Co(II and Ni (II) complexes and an octahedral geometry for Cu(II) complex.

KEYWORDS:

5-(4-Chlorophenyl)-3-(2-naphthyl)-1-phenyl-4;5-dihydro-1H-pyrazole; complexes; CHN elemental analysis; molar conductivity; Ir and EPR