Synthesis and structure of metal complexes containing zwitterionic N-hydroxyimidazole ligands |
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| Authors: | Suaad Abuskhuna Malachy McCann John Briody Michael Devereux Kevin Kavanagh Nijhuma Kayal Vickie McKee |
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| Affiliation: | 1. Chemistry Department, National University of Ireland Maynooth, Maynooth, Co. Kildare, Ireland;2. Dublin Institute of Technology, Cathal Brugha Street, Dublin, Ireland;3. Biology Department, National University of Ireland Maynooth, Maynooth, Co. Kildare, Ireland;4. Chemistry Department, Loughborough University, Loughborough, Leics. LE11 3TU, UK |
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| Abstract: | Cu(II) and Zn(II) complexes of N-hydroxyimidazoles were synthesised by reacting simple metal perchlorate salts with the imidazole ligand in alcohol and formulated with a metal:ligand ratio of 1:2. The X-ray crystal structures of five complexes (four Cu(II) and one Zn(II)) were obtained and each showed the two trans, N-hydroxyimidazole ligands forming six-membered, chelate rings with the metal. Both of the NO chelating, neutral N-hydroxyimidazole ligands are in the zwitterion form, with the uncoordinated imidazole imine N atom being protonated and the oxime O atom deprotonated. In the solid state the complexes form hydrogen-bonded supramolecular structures. |
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| Keywords: | N-hydroxyimidazole Metal complex Zwitterion X-ray structure Supramolecular |
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