Bis{μ3-cis-N-(2-carboxylato-5-chlorophenyl)-N′-[3-(dimethylamino)propyl]oxamidato(3−)}bis(perchlorato-κO)bis(N,N,N′,N′-tetramethylethylenediamine)tetracopper(II)
2011
The title complex, [Cu4(C14H15ClN3O4)2(ClO4)2(C6H16N2)2], is a tetranuclear copper(II) complex lying about an inversion center wherein a cis-oxamide group is coordinated to both Cu atoms with bite angles of 84.45 (6) and 84.08 (10)°. Both Cu atoms adopt distorted square-pyramidal coordination geometries. The apical position of one Cu atom is occupied by an O atom from a perchlorate group, with a Cu—O bond length of 2.519 (7) A, while the apical site of the other Cu atom is occupied by a carboxylate O atom with a Cu—O distance of 2.281 (3) A. The Cu atoms bridged by oxamide and carboxylate-group bridges are separated by 5.204 (6) and 5.603 (2) A, respectively. The crystal structure is consolidated by weak intermolecular C—H⋯O interactions. Two perchlorate O atoms are disordered with unequal site-occupancy factors.
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