Synthesis,crystal structure and thermal behaviour of [La(hfa)3(Phen)2] (hfa = hexafluoroacetylacetonate,Phen = o-phenanthroline) |
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| Institution: | 1. School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong, 643000, P. R. China;2. Department of Chemistry, Faculty of Science, University of Lucknow, Lucknow 226 007, India;3. Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;4. Vanadium and Titanium Resource Comprehensive Utilization Key Laboratory of Sichuan Province, Panzhihua, 617000, P. R. China |
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| Abstract: | The mixed ligand complex La(hfa)3(Phen)2] (I) was obtained by the interaction of La(hfa)3 and Phen; its composition does not depend on the stoichiometry of the reagents. According to the X-ray single crystal analysis data, complex I crystallizes in the monoclinic space group P21/n, with a = 13.583(3) Å, b = 16.959(3) Å, c = 18.860(4) Å, β = 94.71(3)° and Z = 4. The structure of I consists of isolated mononuclear molecules, the coordination number of La being 10. Thermal behaviour and composition of the vapor phase have been studied for I by thermal analysis and mass-spectrometry using a Knudsen cell. The mixed ligand complex I was found to sublime congruently in the temperature range 370–460 K: La(hfa)3(Phen)2](s) = La(hfa)3(Phen)](g) + Phen(g), ΔrH0(T) = 316.2 ± 1.8 kJ/mol. |
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