Resumen de A cu(ii) polymeric complex surveying triethanolamine and 1,2-di(4-pyridyl)ethylene as bridging ligands

Ana María Atria, José Parada, Maria Teresa Garland, Ricardo Baggio

• We report the synthesis and crystal structure of a copper (II) polymeric complex (I) prepared by reaction of Cu(ClO4)2 ·5H2O with H3tea (triethanolamine,) and dpe (1,2-di(4-pyridyl)ethylene). in ethanol. The compound is made up of two well differentiated substructures, the first one being a cationic 1D polymer balanced by ClO4- counteranions {[Cu2(H2tea)2(dpe)]·(ClO4)2}n and the second one made is up of two dimers of different occupancies and charge content, viz., [Cu2(Htea)2(dpe)] (neutral, 64% occupancy) and [Cu2(H2tea)2(dpe)]2+ (cationic, 36% occupancy), this latter fraction balancing the charge introduced by ClO4- anions with 72% occupancy. Both substructures differ in that the Hm tea anions in the dimers (m = 1,2) do not bridge cations as their homologue H2tea does in the polymer, but chelate instead one single Cu each. As shown in scheme. The structure of (I) is compared with its close relative [Cu2(H2tea)2(dpe)]·(bpe)·(ClO4)2·H2O (II), where the same original constituents assemble in a slightly different way¹.