Supramolecular architectures and structural diversity in a series of lead (II) Chelates involving 5-Chloro/Bromo thiophene-2-carboxylate and N,N’-donor ligands

摘要

Background Lead is a heavy toxic metal element in biological systems and is one of the major pollutants as a result of its widespread use in industries. In spite of its negative roles the coordination chemistry of Pb(II) complexes is a matter of interest. The N,N鈥?bidentate aromatic bases such as BPY,4-BPY and PHEN (BPY鈥?鈥?,2鈥瞓ipyridine, 4-BPY鈥?鈥?,4鈥?dimethyl-2,2鈥?bipyridine, PHEN鈥?鈥?,10-Phenanthroline) are widely used to build supramolecular architectures because of their excellent coordinating ability and large conjugated system that can easily form 蟺-蟺 interactions among their aromatic moieties. A series of novel Pb(II) complexes in concert with 5-CTPC, 5-BTPC (5-CTPC鈥?鈥?-chlorothiophen-2-carboxylate, 5-BTPC鈥?鈥?-bromothiophen-2-carboxylate) and corresponding bidentate chelating N.N鈥?ligands have been synthesized and characterized.