Spectroscopic, thermal and kinetic studies of coordination compounds of Zn(II), Cd(II) and Hg(II) with norfloxacin

Some metal complexes of norfloxacin (NOR) with the formula [M(NOR) 2 ]X 2 · n H 2 O [M = Zn(II), (X = Cl − , AcO − , Br − and I − ), Cd(II), (X = Cl − , NO 3 − and SO 4 2− ) and Hg(II) (X = Cl − , NO 3 − and AcO − )] have been synthesised and studied using elemental analysis (CHN), electronic (UV–vi...

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Published in:Journal of thermal analysis and calorimetry Vol. 102; no. 1; pp. 225 - 232
Main Authors: Refat, Moamen S., Mohamed, Gehad G., de Farias, Robson F., Powell, Annie K., El-Garib, Mohamed S., El-Korashy, Sabry A., Hussien, Mostafa A.
Format: Journal Article
Language:English
Published: Dordrecht Springer Netherlands 01-10-2010
Springer
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Summary:Some metal complexes of norfloxacin (NOR) with the formula [M(NOR) 2 ]X 2 · n H 2 O [M = Zn(II), (X = Cl − , AcO − , Br − and I − ), Cd(II), (X = Cl − , NO 3 − and SO 4 2− ) and Hg(II) (X = Cl − , NO 3 − and AcO − )] have been synthesised and studied using elemental analysis (CHN), electronic (UV–vis, mid infrared, mass, and 1 H-NMR spectra), TG and DTA. The thermal decomposition processes of these complexes were discussed. The Correlation coefficient, the activation energies, E *, the pre-exponential factor, A , the entropies, S *, enthalpies, H * and Gibbs free energies, G *, of the thermal decomposition reactions have been derived from thermogravimetric (TG) and differential thermogravimetric (DTG) curves. The characterization of the final products of the decomposition was achieved by IR spectra and X-ray powder diffraction (XRD). Using the Coats–Redfern and Horowitz–Metzeger methods, kinetic analysis of the thermogravimetric data is performed.
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ISSN:1388-6150
1588-2926
1572-8943
DOI:10.1007/s10973-009-0404-x