Spectral and thermal characteristics of copper(II) carboxylates with fatty acid chains and their benzothiazole adducts

The carboxylato-Cu(II) complexes of type [Cu-2(RCOO)(4)] and their benzothiazole adducts [Cu-2(RCOO)(4)bt(2)] (bt = benzothiazole, R = CH3(CH2) (n-2), n = 12, 14, 16, 18) form the main objectives of this study. The studied carboxylato-Cu(II) complexes are formed from dimeric units to polymeric chains (chromofor CuO5). The structural changes are due to coordination of ligand (benzothiazole). The polymeric chains of carboxylato-Cu(II) complexes degraded to discrete centrosymetric tetracarboxylate-bridged dimmers (chromofor CuO4N). These prepared compounds [Cu-2(RCOO)(4)] and [Cu-2(RCOO)(4)L-2] were submitted to measurements relating to spectral (IR, UV-Vis) and thermal properties (TG, DTA, DSC).