A Cu(II) POLYMERIC COMPLEX SURVEYING TRIETHANOLAMINE AND 1,2-DI(4-PYRIDYL)ETHYLENE AS BRIDGING LIGANDS
Abstract
We report the synthesis and crystal structure of a copper (II) polymeric complex (I) prepared by reaction of Cu(ClO 4 ) 2 5H 2 O with H 3 tea (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 ClO 4 -counteranions {[Cu 2 (H 2 tea) 2 (dpe)](ClO 4 ) 2 } n and the second one made is up of two dimers of different occupancies and charge content, viz., [Cu 2 (Htea) 2 (dpe)] (neutral, 64% occupancy) and [Cu 2 (H 2 tea) 2 (dpe)] 2+ (cationic, 36% occupancy), this latter fraction balancing the charge introduced by ClO 4 anions with 72% occupancy. Both substructures differ in that the H m tea anions in the dimers (m = 1,2) do not bridge cations as their homologue H 2 tea 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 [Cu 2 (H 2 tea) 2 (dpe)](bpe)(ClO 4 ) 2 H 2 O (II), where the same original constituents assemble in a slightly different way 1 .