Synthesis, Characterization and Crystal Structure Determination of Copper (II) Complexes with 2,2′-Dimethyl- 4,4′-bithiazole

Copper complexes, [Cu(dm4bt)Cl2(DMSO)] (1) and [{Cu(dm4bt)(H2O)(tpht)} ⋅ H2O] n (2) (dm4bt, 2,2′-dimethyl-4,4′-bithiazole; tpht, terephthalate), have been synthesized and their crystal structures were determined by X-ray crystallography. Complex 1 was prepared from a reaction of CuCl2 ⋅ 2H2O with dm4bt and terephthalic acid in a mixture of methanol, water, and DMSO. Complex 2 was prepared from a reaction of CuCl2 ⋅ 2H2O with dm4bt, terephthalic acid, and ethylene diamine in a mixture of methanol and water. The two complexes were characterized by IR, UV-Vis spectroscopy, and single-crystal structure. Complex 2 was also characterized by electron paramagnetic resonance spectra. Complex 1 is a monomer while 2 is a coordination polymer. This copper tpht polymer has a cis-configuration of tpht rings opposed to zigzag chains with anti-configuration usually reported in the literature.