Acta Cryst. (2011). E67, m645-m646 [ doi:10.1107/S1600536811014978 ]
Abstract: 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) Å, 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) Å. The Cu atoms bridged by oxamide and carboxylate-group bridges are separated by 5.204 (6) and 5.603 (2) Å, respectively. The crystal structure is consolidated by weak intermolecular C-HO interactions. Two perchlorate O atoms are disordered with unequal site-occupancy factors.
Online 29 April 2011
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