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http://dx.doi.org/10.5012/jkcs.2002.46.2.099

Spectral, Magnetic, and Thermal Properties of Some Thiazolylazo Complexes  

Masoud, M.S. (Chemistry Department)
Mohamed, G.B. (Physics and Chemistry Department)
Abdul-Razek Y.H. (Physics and Chemistry Department)
Ali A.E. (Physics and Chemistry Department)
Khairy F.N. (Chemistry Department)
Publication Information
Journal of the Korean Chemical Society / v.46, no.2, 2002 , pp. 99-116 More about this Journal
Abstract
The thiazolylazo compounds and their Co(II), Ni(II) and Cu(II) complexes of barbituric acid, uracil, thiouracil, citrazinic acid, chromotropic acid, gallic acid, pyrogallol and salicylic acid were pre-pared and characterized by $^1H$ NMR , IR and the effect of pH on the electronic absorption spectra . The mode of ionization, the electronic transitions and the dissociation constants were discussed. The stoichiometries of the complexes were of 1:1, 2:1 and 3:2 (M:L). The copper complexes are of isotropic ESR spectra (except that of gallic acid which showed a complicated one) and are of magnetically diluted behaviour with orbital con-tribution. Detailed DTA data were obtained and discussed.
Keywords
thiazolylazo compound; (2-thiazolylazo)salicylic acid; (2-thiazolylazo)barbituric acid;
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