STUDIES ON SOME THIAZOLYLAZO COMPOUNDS AND THEIR COBALT, NICKEL, AND COPPER COMPLEXES

M. S. Masoud Chemistry Department, Faculty of Science, Alexandria University, Damanhour, Egypt; Chemistry Department, Faculty of Science, Alexandria University, Damanhour, EgyptCorrespondence[email protected]

G. B. Mohamed Physics and Chemistry Department, Faculty of Education, Alexandria University, Damanhour, Egypt

Y. H. Abdul-Razek Physics and Chemistry Department, Faculty of Education, Alexandria University, Damanhour, Egypt

A. E. Ali Physics and Chemistry Department, Faculty of Education, Alexandria University, Damanhour, Egypt

F. N. Khairy Chemistry Department, Faculty of Science, Omderman University, Khartoum, Sudan

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 prepared 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 contribution. Detailed DTA data were obtained and discussed.

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STUDIES ON SOME THIAZOLYLAZO COMPOUNDS AND THEIR COBALT, NICKEL, AND COPPER COMPLEXES

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STUDIES ON SOME THIAZOLYLAZO COMPOUNDS AND THEIR COBALT, NICKEL, AND COPPER COMPLEXES

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