Physical characterization of some complexes of organic nitrogen donor compounds

Faculty	Science	Year:	2011
Type of Publication:	Article	Pages:	169-178
Authors:	Abd El Wahed, M. G, Elmesallamy, M. A, Kater, H. M, El Gamel, M. M, Khalil, N. A	DOI:	10.1016/j.arabjc.2010.06.034
Journal:	ARABIAN JOURNAL OF CHEMISTRY KING SAUD UNIV PRESS, KING SAUD UNIV	Volume:	4
Research Area:	Chemistry	ISSN	ISI:000290142000007
Keywords :	Stability constants, Thermodynamic functions, Conductometry, Spectroscopic and thermal studies
Abstract:	The stability constants of the complexes of cyanopyridine and aminoantipyrine with some divalent transition metal chlorides were determined at different temperatures. The thermodynamic parameters were calculated; the obtained data reveal that the complexation is an endothermic process. Also it was found that the type of bonding between the ligands and the corresponding metal ion is mainly ionic in nature. The stoichiometry of the formed complexes was found to be M:L and M:2L. The structure of some prepared complexes was confirmed by IR, (1)H NMR spectra as well as elemental analysis. Thermal stability was studied using TGA technique. (c) 2010 King Saud University. Production and hosting by Elsevier B.V. All rights reserved.
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