Research Article: Di-μ-chlorido-bis­[(1,10-phenanthroline-κ2N,N′)(trichloro­acetato-κO)copper(II)]

Date Published: March 01, 2012

Publisher: International Union of Crystallography

Author(s): Gholam Hossein Shahverdizadeh, Seik Weng Ng, Edward R. T. Tiekink, Babak Mirtamizdoust.


The title compound, [Cu2(C2Cl3O2)2Cl2(C12H8N2)2], features a centrosymmetric binuclear complex. The coordination geometry around the CuII atom is square-pyramidal, comprising two N atoms from a symmetrically chelating 1,10-phenanthroline ligand, one O atom from a trichloro­acetate ligand and two Cl− anions. In addition, there is a weak intra­molecular Cu⋯O inter­action of 2.9403 (14) Å involving the carbonyl O atom of the trichloro­acetate ligand. The central Cu2Cl2 core takes the form of a rhombus, owing to the disparate Cu—Cl bond lengths. Mol­ecules are connected in the crystal structure by C—H⋯Cl and C—H⋯O inter­actions.

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For background to crystal engineering studies of CuII 1,10-phenanthroline complexes, see: De Burgomaster et al. (2010 ▶). For specialized crystallization techniques, see: Harrowfield et al. (1996 ▶). For closely related binuclear CuII mol­ecules with chloride, carboxyl­ate and bipyridine ligands, see: Jiang et al. (2007 ▶); Zheng et al. (2008 ▶). For descriptive parameters of pyramidal and trigonal–bipyramidal geometries, see: Addison et al. (1984 ▶); Spek (2009 ▶).