The syntheses, characterization, and crystal structures of the reaction products of Cu2+ with imidazole (Himz) and different aromatic carboxylates, viz.: [Cu(Himz)2(cinn)2(H2O)] (1), [Cu(Himz)2(paba)2]
(2) and [Cu(Himz)2(clba)2] (3) (cinn– = C9H7O2
–, paba– = C7H6NO2
–, clba– = C7H4ClO2
are described and studied by spectroscopic (UV–visible, FTIR) measurements. Single-crystal X-ray diffraction analyses indicate that each complex is monomeric. The metal ion in 1 adopts square-pyramidal coordination geometry arising from two imidazole nitrogens, two cinnamate oxygens,
and an apical aqua. The metal ions of 2 and 3, however, assume a square planar configuration, which is realized by coordination of two nitrogens of two imidazoles and two oxygens; in both complexes, the imidazole moieties are trans to each other. TGA results indicate that
upon heating, these complexes lose their carboxylate anions first, followed by removal of the imidazole molecules.
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Document Type: Research Article
Department of Chemistry, Government Post Graduate Islamia College for Women, Lahore, Pakistan
Department of Chemistry, University of Aberdeen, Aberdeen, Scotland
Pakistan Council of Scientific and Industrial Research (PCSIR) Laboratories Complex Lahore, Lahore, Pakistan
Department of Chemical Engineering, University of Gujrat, Gujrat, Pakistan
May 3, 2018