Transition metal complexes with Girard reagent-based ligands. Part IV. Synthesis and characterization of pyridoxilidene Girard-T hydrazone complexes. Crystal structure of the copper(II) complex |
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Authors: | Ljiljana S Vojinovi?-Je?i? Goran A Bogdanovi? Vukadin M Leovac Valerija I ?e?ljevi? Ljiljana S Jovanovi? |
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Institution: | (1) Department of Chemistry, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, Novi Sad, 21000, Serbia;(2) VINČA Institute of Nuclear Sciences, P.O. Box 522, Belgrade, 11001, Serbia |
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Abstract: | Abstract The monoligand complexes of the formula M(HPLGT)(NCS)2 (M = Cu(II), Zn(II)) in which the ligand tridentate ONO pyridoxilidene Girard-T hydrazone, H3PLGT]Cl2 · 2H2O, was coordinated in neutral doubly deprotonated form were synthesized. Also, the first complexes with the ligand coordinated
in triply deprotonated monoanionic form of the formula Cu(PLGT)N3] and Co(PLGT)(NO2)2NH3] · 3H2O are reported. The single crystal X-ray analysis of Cu(HPLGT)(NCS)2] showed that Cu(II) is placed in a square-pyramidal surrounding consisting of one tridentate Schiff base and one NCS group
in the basal plane and the other NCS group in the apical position. Intermolecular hydrogen bonds leading to centrosymmetrical
dimerization of these complexes were discussed. In the reaction of Girard-T and Hacac in the presence of CuCl2, a mixture of single crystal complexes of the composition Cu(3,5-Me2pz)2Cl2]2 and Cu(acac)2] · 2Cu(3,5-Me2pz)2Cl2] was obtained and X-ray analysis of the latter one was reported.
Index abstract Crystal structure of the Cu(II) complex with pyridoxilidene Girard-T hydrazone was analyzed. Additional two Cu(II) complexes
obtained by the reaction of Girard-T reagent and Hacac in the presence of CuCl2 were also studied by single crystal X-ray analysis. ![MediaObjects/11224_2008_9368_Figa_HTML.gif](/content/rt16t74400606115/MediaObjects/11224_2008_9368_Figa_HTML.gif) |
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Keywords: | Pyridoxilidene Girard-T hydrazone Cu(II) Zn(II) Co(III) complexes Crystal structures Electronic absorption spectra |
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