Available online at www.scholarsresearchlibrary.com Scholars Research Library Archives of Applied Science Research, 2012, 4 (2):1203-1207 (http://scholarsresearchlibrary.com/archive.html) ISSN 0975-508X CODEN (USA) AASRC9 1203 Scholars Research Library Syntheses of complexes of nickel (II) and manganese (II) nitrate with furancarbamide, benzoic acid hydrazide and its acetone hydrazone derivative S. A Emmanuel 1 , S. A Thomas 1 , S. O Idris 2 , J. F Iyun 2 1 Sheda Science and Technology Complex Sheda Abuja 2 Chemistry Department ABU Zaria ______________________________________________________________________________ ABSTRACT Chelate of furancarbamide (FUR), benzoic acid hydrazide (BAH) and its acetone hydrazone (ABH) with nickel (II) and manganese (II) nitrate have been prepared. The complexes and ligands were characterized by Fourier transform infrared spectra analysis, electronic spectra analyses, conductivity, melting point, and solubility. The FTIR analysis indicated that the ligand (FUR) coordinated with the metal ions through the carbonyl oxygen, the azomethine nitrogen and amine nitrogen, while (ABH) coordinated through the carbonyl oxygen and azomethine nitrogen. The BAH ligand coordinated through carbonyl oxygen and the primary amine nitrogen. This is an indication that the ligands acted as tridentate and bidentate donors to the metal ions. The electronic spectra showed the complexes of Ni with ABH and BAH as octahedral geometry. The conductivity data showed the complexes as non electrolytes. Elemental analysis indicate that the complexes of BAH and ABH formed an M:L 2 . X type with Ni and Mn formed an ML 1 type with ABH. The FUR complex formed with Mn is an ML 1 .X type complex and ML 3 type for Ni. Key Word: benzoic acid hydrazide acetonebenzoic acid hydrazone, furancarbamide, metal ion, complex, ligand. ______________________________________________________________________________ INTRODUCTION We have previously reported the synthesis and characterization of copper II complexes obtained from furancarbamide (FUR), benzoic acid hydrazide (BAH) and its acetone hydrazone derivatives (ABH). The coordinating properties of various carbazone semicarbazones, hydrazones and Schiff base ligands have been reported (1-8). These compounds have been known for their intriguing chelating properties with transition metals. They have found application in pharmacology, electrochemistry, agrochemicals etc. In this paper we present the synthesis and characterization of FUR, BAH and ABH complexes with nickel II and manganese II nitrate using infrared spectroscopy, electronic spectra, conductivity and other physicochemical properties of the complexes with the aim of studying the nature of the chelating characteristics of the ligands with the transition metals and their possible applications. MATERIALS AND METHODS Reagents All the reagents used for this study are of analytical grade and were obtained from Sigma Aldrich Company and BDH. They were used without further purification. Preparation of ligands and metal complexes The methods of preparation of ligands and metal complexes have been reported previously by Emmanuel et al. The weight of Ni and Mn salts and ligands varied according to the stoichiometric calculation shown in the scheme of synthesis of the metal complexes [14].