Date Published: August 01, 2009
Publisher: International Union of Crystallography
Author(s): Wen-Kui Dong, Jun-Feng Tong, Li-Li An, Jian-Chao Wu, Jian Yao.
In the title complex, [Cu(C12H7BrClN2O)2], the CuII center is tetracoordinated by two phenolate O and two azomethine N atoms from two independent bidentate 4-bromo-2-[(2-chloro-3-pyridyl)iminomethyl]phenolate (L) ligands. In the crystal structure, the CuII atom has a distorted square-planar coordination environment. The interplanar dihedral angles between the benzene and pyridine rings in the individual ligands are 63.83 (4) and 54.43 (3)°, indicating the pyridine ring to have considerably weaker steric hindrance.
For the applications of phenoxyimines, see: John et al. (2007 ▶). For the structures of salen-type bisoxime complexes, see: Dong et al. (2009a ▶,b ▶). Due to their chelating ability and positive redox potential, many copper(II) complexes are biologically active, see: Karmaka et al. (2007 ▶). For the preparation of (E)-[4-bromo-2-((2-chloropyridin-3-ylimino)methyl)]phenol, see: Dong et al. (2009c ▶). For bond-length data, see: Allen et al. (1987 ▶).