Date Published: April 01, 2012
Publisher: International Union of Crystallography
Author(s): Ejaz, Islam Ullah Khan, Alina Murtaza, William T. A. Harrison.
In the monomeric title complex, [Cu(C4H5O2)2(C8H11N)2], the CuII atom lies on a centre of inversion. Its coordination by two substituted pyridine ligands and two carboxylate anions leads to a slightly distorted trans-CuN2O2 square-planar geometry. The dihedral angle between the mean planes of the pyridine (py) ring and the carboxylate group is 74.71 (7)°. The dihedral angles between the planar CuN2O2 core and the py ring and carboxylate plane are 67.72 (5) and 89.95 (5)°, respectively. Based on the refined C=C and C—C bond lengths, the terminal =CH2 and –CH3 groups of the carboxylate anion may be disordered, but the disorder could not be resolved in the present experiment. Several intramolecular C—H⋯O interactions occur. In the crystal, molecules are linked by weak C—H⋯O hydrogen bonds, generating chains propagating in .
For the crystal structures of related monomeric complexes containing a trans-CuN2O2 core, see: Borel et al. (1981 ▶); Heimer & Ahmed (1982 ▶); Jedrzejas et al. (1994 ▶).