Monomer and cyclic tetramer of copper(II) complexes: Synthesis,characterization and crystal structure determination of [Cu(dm4bt)Cl(Hipht)] and [{Cu(dm4bt)(H2O)(ipht)}4·2H2O] |
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| Authors: | Radhiya Al-Hashemi Nasser Safari Saeid Amani Vahid Amani Hamid Reza Khavasi |
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| Institution: | 1. Department of Chemistry, Shahid Beheshti University, G.C., Evin, Tehran 1983963113, Iran;2. Department of Chemistry, Arak University, Dr. Beheshti Ave., Arak 38156, Iran |
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| Abstract: | Copper complexes, Cu(dm4bt)Cl(Hipht)] (1) and {Cu(dm4bt)(H2O)(ipht)}4·2H2O] (2) (where dm4bt is 2,2′-dimethyl-4,4′-bithiazole, Hipht is hydrogen isophthalate and ipht is isophthalate) have been synthesized. These two complexes were characterized by IR, UV–Vis and EPR spectroscopy. Moreover; their single-crystal structures were studied by the X-ray diffraction method. Complex 1 has a monomer structure and copper has accepted a distorted square pyramidal structure. Isophthalic acid in 1 lost one of its protons and produced one bidentate carboxylate and one free carboxylic acid. Controlled deprotonation in the presence of ethylene diamine results in self-assemblies of 1 to form a tetramer complex of 2. Complex 2 has two kinds of spatial isomers which are resolved by EPR and X-ray. |
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| Keywords: | Copper 2 2&prime -Dimethyl-4 4&prime -bithiazole Isophthalic acid Monomer Cyclic tetramer Crystal structure |
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