Synthesis and Characterization of Transition Metal(II) Schiff Bases Complexes Derived from 2,5-Dihalosalicylaldehyde and 4-Methyl-3-thiosemicarbazide

Jai Devi*, Manju Yadav and Som Sharma

Department of Chemistry, Guru Jambheshwar University of Science and Technology, Hisar-125 001, India

*Corresponding author: E-mail: jaya.gju@gmail.com

Abstract

The metal complexes of cobalt(II), nickel(II) copper(II) and zinc(II) with Schiff bases [HL1-2] derived from 2,5-dichlorosalicylaldehyde/2,5-dibromosalicylaldehyde and 4-methyl-3-thiosemicarbazide were synthesized. The structure of all the compounds have been evaluated on the basis of elemental analysis, molar conductance measurements and spectroscopic studies like FT-IR, UV-visible, NMR, ESR and mass. The Schiff base ligands existed as NOS donor coordinating to metal ion through azomethine nitrogen, sulphur of thiosemicarbazide and oxygen of deprotonated phenolic group forming complexes of the type [M(L1-2)2] in 1:2 molar ratio. The spectroscopic data and physical measurement techniques suggested octahedral geometry around metal centres.

Keywords

Dibromosalicylaldehyde, Spectroscopic studies, Thiosemicarbazide, Octahedral.

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