Preparation and Characterisation of Some Transition Metal Complexes of Niacinamide (Vitamin B3)

Md. Mahmudul Hasan; Md. Elius Hossain; M. Ershad Halim; Md. Qamrul Ehsan

doi:10.52763/PJSIR.PHYS.SCI.58.2.2015.59.65

Md. Mahmudul Hasan Department of Chemistry, University of Dhaka, Dhaka-1000, Bangladesh
Md. Elius Hossain
M. Ershad Halim
Md. Qamrul Ehsan Department of Chemistry, University of Dhaka, Dhaka-1000, Bangladesh

DOI: https://doi.org/10.52763/PJSIR.PHYS.SCI.58.2.2015.59.65

Keywords: niacinamide, magnetic susceptibility, metal complexes, thermo gravimetric analysis

Abstract

Niacinamide forms metal complexes of general formula [M(C₆H₆N₂O)₂]Cl₂; where M = Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) in the aqueous medium. The complexes were formulated by comparing the experimental and calculated data for C, H, N and metal. The prepared complexes were characterised by different physicochemical methods. The UV-vis, FTIR spectral analysis and thermo gravimetric analysis
(TGA). TGA of these complexes have been discussed. Magnetic susceptibility values indicate that all complexes except Zn complex are paramagnetic in nature. The redox properties of the metal ions in the Mn, Cu and Zn complexes have been discussed from the cyclic voltammetric studies. In all cases the systems are quasi reversible.