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Correlation Within Paramagnetic Shifts of 1h Nmr of 3-Imidazolidine Nitroxyl free Radical Transition Metal Complexes

Volume 19, Number 2

E. M. R. Kiremire, G. Kumar, K. Chibale, J. C. A. Boeyens, J. Makhubela and E. Matabane

University of Namibia, Private Bag 13301 Windhoek (Namibia) Department of Chemistry, University of Capetown, Rondebosch 7701 (South Africa)

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ABSTRACT:

The 1HNMR paramagnetic shifts of NiL2 phen, Nil2 Im2 and ML2 complexes where M = Co(II), Ni(II), Cu(II) and Zn(II) and L is the deprotonated imidazolidine nitroxyl free radical ligand have been obtained and analysed. The paramagnetic shifts of the phenyl proton were found to increase in the order Zn(II) < Cu(II) < Ni(II) < Co(II) in congruence with increase in the magnetic moment of the metal ion.

KEYWORDS:

Paramagnetic shifts; free radical; transition metal complexes

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Kiremire E. M. R, Kumar G, Chibale K, Boeyens J. C. A, Makhubela J, Matabane E. Correlation Within Paramagnetic Shifts of 1h Nmr of 3-Imidazolidine Nitroxyl free Radical Transition Metal Complexes. Orient J Chem 2003;19(2).

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Kiremire E. M. R, Kumar G, Chibale K, Boeyens J. C. A, Makhubela J, Matabane E. Correlation Within Paramagnetic Shifts of 1h Nmr of 3-Imidazolidine Nitroxyl free Radical Transition Metal Complexes. Orient J Chem 2003;19(2). `Available from: http://www.orientjchem.org/?p=17724"

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