Study of the Preparation of Peroxo Complexes of Ni(II), Mn(II) and Cr(III)

M. S. Zoha¹*, Bolaram Roy¹, Tarun Pal² and A. Farooque³

¹Department of Agricultural Chemistry and Biochemistry, Hajee Mohammad Danesh Science & Technology University, Dinajpur - 5200 (Bangladesh) ²Department of Chemistry, Rajshahi University of Engineering and Technology, Rajshahi (Bangladesh) ³Department of Chemistry, University of Rajshahi, Rajshahi - 6205 (Bangladesh)

ABSTRACT:

Eight complexes of Ni(II), Mn(II) and Cr(III) were prepared. Five Ni(II) complexes, two Mn(II) complexes & one Cr(III) complex. All the complexes were characterized by elemental analysis, magnetic measurement, UV-vis and IR spectral studies. Complexes are [Ni(en)2](NO3)2 (1), [Ni(o-aminobenzoate)2] (2), [Ni(NCS)2(en)] (3), [Ni(SCN)2(en)] (4), [Ni(o-aminobenzoate)(O2)] (5), [Cr(en)2(O2)] (6), [Mn(o-aminobenzoate)3] (7), [Mn(o-aminobenzoate)2(O2)] (8). Formation of peroxo complexes take place, when both monodentate and bidentate ligand mixed with a metal salt followed by the addition of H2O2, but no peroxo complexes formed when only bidentate ligand presents. One reason might be that peroxo ligand could easily replace monodentate ligand SCN-, but not bidentate ligand ethylenediamine and o-aminobenzoic acid. In case of [Ni(NCS)2(en)] complex, it was observed that coordination of NCS- to Ni2+ changed from N and S after addition of H2O2 to [Ni(NCS)2(en)] complex.

KEYWORDS:

Peroxo complexes; en = ethylenediamine; o-aminobenzoic acid

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Copy the following to cite this article: Zoha M. S, Roy B, Pal T, Farooque A. Study of the Preparation of Peroxo Complexes of Ni(II), Mn(II) and Cr(III). Orient J Chem 2007;23(1).

Copy the following to cite this URL: Zoha M. S, Roy B, Pal T, Farooque A. Study of the Preparation of Peroxo Complexes of Ni(II), Mn(II) and Cr(III). Orient J Chem 2007;23(1). Orient J Chem 2006;23(1). Available from: http://www.orientjchem.org/?p=19711