Aqua-(2,2′-bipyridine-2 N,N′)bis-(thio-phene-2- carboxyl-atoκ-O)copper(II)

Abstract

In the title complex, [Cu(C5H3O2S) 2(C10H8N2)(H2O)], the CuII atom is in a distorted square-pyramidal environment, with an Addison τ parameter of 0.07. The coordination geometry is defined by two nitro-gen donors from the 2,2′-bipyridine ligand, two O atoms from two monodentate thio-phene-2-carboxyl-ate ligands and one O atom from the aqua ligand. The latter occupies the elongated apical position. This is different from the related structure of aqua-(1,10-phenanthroline)bis-(thio-phene-2- carboxyl-ato)copper(II) where a carboxyl-ate O atom is in the apical position [Feng et al. (2005). Z. Kristallogr. New Cryst. Struct. 220, 429-430]. The uncoordinated carboxyl-ate O atoms form intra- and inter-molecular hydrogen bonds to the aqua ligand. Two neighbouring 2,2′-bipyridine ligands form a π-stack, with a centroid-centroid distance of 3.683 (2) Å. © 2009 Mahmoud and Janiak.