Synthesis and Thermal Study of 8-Hydroxyquinoline Derivatives of the Alkaline Earth Metals I. Strontium Complexes

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.