title: Aqua-(2,2'-bipyridine-κN,N')bis-(thio-phene-2-carboxyl-ato-κO)copper(II).
abstract: In the title complex, [Cu(C(5)H(3)O(2)S)(2)(C(10)H(8)N(2))(H(2)O)], the Cu(II) 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.
authors.affiliation: Institut für Anorganische und Analytische Chemie, Universität Freiburg, Albertstrasse 21, D-79104 Freiburg, Germany.
authors.forename: Reda F
authors.initials: RF
authors.lastname: Mahmoud
authors.forename: Christoph
authors.initials: C
authors.lastname: Janiak