Synthesis and Thermal Study of 8-Hydroxyquinoline Derivatives of the Alkaline Earth Metals I. Strontium Complexes |
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Authors: | C T R Guerreiro C A Ribeiro M S Crespi C Torres |
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Institution: | (1) Instituto de Química de Araraquara-UNESP, R. Prof. Francisco Degni, s/n, C. P. 355, CEP. 14801-970 Araraquara, Brazil |
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Abstract: | Strontium complexes of 5,7-dibromo-, 5,7-dichloro-, 7-iodo- and 5-chloro-7-iodo-8-hydroxyquinoline were precipitated from
an aqueous ammonia and acetone medium. The complexes obtained were Sr(C9H4ONBr2)2]·2.5H2O; Sr(C9H4ONCl2)(OH)]·1.5H2O; Sr(C9H5ONI)2]·5H2O and Sr(C9H4ONICl)(OH)]·1.25H2O. The residues of their thermal decomposition were SrBr2; a mixture of SrCl2, SrCO3 and SrO; SrCO3 and SrCO3, respectively. All were characterized by means of thermogravimetry, differential thermal analysis, complexometry with EDTA,
atomic absorption spectroscopy, IR spectroscopy and X-ray diffraction.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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Keywords: | DTA 8-hydroxyquinoline and its halogenated derivatives strontium TG thermal behaviour |
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