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Synthesis, characterization and thermogravimetric study of Cu(II) adducts with 3- and 4-amino-1,2,4-triazole, 2-mercaptothiazoline and 2-mercaptopyridine

Refat Moamen S. (Department of chemistry, Faculty of education, Port-Said Suez Canal University, Port Said)
de Farias Robson F. (Departamento de Química, Universidade Federal de Roraima, Boa Vista)

The adducts CuCl2·(3amt), CuCl2·2(3amt)·2H2O, CuCl2·3(3amt), CuCl2·(4amt), CuCl2·2(4amt), CuCl2·3(4amt)·2H2O, CuCl2·(2mct)·H2O, CuCl2·2(2mct)·2.5H2O, CuCl2·3(2mct)·2H2O, CuCl2·(2mcp) and CuCl2·2(2mcp)·H2O, where 3-amino-1,2,4-triazole = 3amt, 4-amino-1,2,4-triazole = 4amt, 2-mercaptothiazoline = 2mct and 2-mercaptopyridine = 2mcp, were synthesized by a solid state route and characterized by CHN elemental analysis and infrared spectroscopy. A thermogravimetric study was also performed. It was verified that 4amp is a molecule with a higher ability to act as a bridging ligand in comparison with 3amp. It was also found that, for all compounds, the mono adducts were the most thermally stable ones. Such a fact is in agreement with a higher ionic and covalent character of the metal-ligand bond in surch compounds. .

Keywords: Cu(II) chloride, IR spectra, adducts, thermogravimetry, triazoles, mercaptothiazoline, mercaptopyridine