Synthesis and spectral studies of Schiff base complexes of cobalt(II), nickel(II) and copper(II) with 1-methyl-2,6-diethyl piperidone thiosemicarbazone

Department of Chemistry, L. N. T. College (B. R. A. Bihar University), Muzaffarpur, Bihar, India

E-mail: binodkr_rai@yahoo.co.in

Department of Physics, Choudhary Charan Singh University, Meerut, Uttar Pradesh, India

University Department of Physics, Chaudhary Charan Singh University, Meerut, Uttar Pradesh, India

Manuscript received /8 August 2009, revised 23 March 2010, accepted 13 April 2010

Schiff base complexes of the type [M(MDET)₂X₂], where M = cobalt(ll), nickel(ll) and copper(ll), MDET = 1-methyl-2,6-diethyl piperidone thiosemicarbazone and X = Cl^-, Br^-, I^-, NO₃^- and CIO₄^- have been prepared. The ligand and metal complexes have been characterized by elemental analyses, magnetic susceptibility, infrared spectra, electronic spectra and molecular conductivity measurements. IR spectral data reveals the compound MDET behaves as neutral bidentate ligand and coordination proposed through azomethine nitrogen and thione sulphur of thiosemicarbazone moiety. The remaining positions of metal ions are satisfied by negative ions, such as Cl^-, Br^-, I^-, NO₃^- and ClO₄^-. The electronic spectral data and magnetic susceptibility values proposed octahedral geometry for the complexes. The molar conductivity were recorded in DMF (10^-3) solution and found to be in the range of 3.01-4.6 Ω^-1 cm² mol^-1, proposed that all the complexes are non electrolytic in nature.