Abstract

Abeer A. Alhadi^¹, Shayma A. Shaker^²*, Wagee A. Yehye^¹, Hapipah Mohd Ali^¹ and A. A. Mahmood^³

An ethanolic solution of metal salts was added slowly to an ethanolic solution of 5-chloro-2hydroxybenzylidene)-3,4,5-trihydroxybenzohydrazone with few drops of triethylamin to give complexes with the general formula [M(GHL2)2]. 2H2O, [Cu2(GHL2)2]. 4H2O and [Cd(GHL2)(CH3COO)2]. 2H2O where M is Ni(II) and Zn(II), GHL2 is 5-chloro-2-hydroxybenzylidene)-3,4,5-trihydroxybenzohydrazone. The resulting complexes were characterized by elemental analysis, magnetic measurements and spectral studies. The Schiff base GHL2 ligand acts as tridentate ligand was coordinated with the metal ions through O, N, O except with Cd(II) as the ligand behaves as bidentate ligand coordinated with Cd(II) ion through O, N atoms. However, [M(GHL2)2]. 2H2O and [Cd(GHL2)(CH3COO)2]. 2H2O were proposed to possess Octahedral geometry while [Cu2(GHL2)2]. 4H2O was proposed to possess tetrahedral geometry.

Hydrazone complexes, 5-chloro-2hydroxybenzylidene)- 3,4,5-trihydroxybenzohydrazone complexes; spectral studies; Schiff base complexes

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