Mononuclear gallium(III) complexes based on salicylaldoximes: Synthesis,structure and spectroscopic characterization |
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| Authors: | Christiana Birnara Vadim G. Kessler Giannis S. Papaefstathiou |
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| Affiliation: | 1. Laboratory of Inorganic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Zografou 157 71, Greece;2. Department of Chemistry, Swedish University of Agricultural Sciences, P.O. Box 7015, 750 07 Uppsala, Sweden |
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| Abstract: | The reactions of Ga(acac)3 with salicylaldoxime (saoH2) and methyl-salicylaldoxime (Me-saoH2) in dichloromethane/hexane afforded the complexes [Ga(acac)(saoH)2] (1) and [Ga(acac)3][Ga(acac)(MesaoH)2] (2), respectively, in high yields. The crystal structures of 1 and 2 have been determined by single-crystal X-ray crystallography. Both complexes are mononuclear with the Ga(III) atoms being in octahedral environments surrounded by two bidentate chelate R-saoH− and one bidentate chelate acac− ligands. A [Ga(acac)3] moiety has co-crystallized along with the methylsalicylaldoximato complex. Characteristic IR as well as NMR data are discussed in terms of the nature of bonding in the structures of the two complexes. 1H and 13C NMR data in CDCl3 indicate that the salicylaldoximato complexes isomerize in solution. |
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| Keywords: | Crystal structure Gallium(III) complexes Mononuclear Ga(III) complexes Oximato complexes Six-coordinated Ga(III) complexes |
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