Synthesis and crystal structure of a Cu(II) complex with mixed malonate/1,10-phenanthroline ligands.

A Cu(II) complex with mixed ligands, [Cu 3 (mal) 3 (phen) 3 (H 2 O) 2 ]  ·  11H 2 O (mal  =  malonate, phen  =  1,10-phenanthroline) was synthesized and characterized by elemental analysis, IR, UV, electron paramagnetic resonance (EPR) and luminescence spectra and single-crystal X-ray diffraction. The complex crystallizes in the monoclinic system, space group Cc with a   =  13.1631(10)  Å, b   =  20.1089(10)  Å, c   =  20.1267(13)  Å, β  =  103.500(3)°, V   =  5180.2(6)  Å 3 , Z   =  4, and R 1   =  0.0476 for 7993 observed reflections. In the complex, one Cu is coordinated by a mal dianion and a phen molecule, exhibiting N 2 O 2 square-planar geometry, while the other two Cu atoms are coordinated, respectively, by a mal dianion, a phen and water molecules, exhibiting N 2 O 3 square pyramidal coordination geometry. [ABSTRACT FROM AUTHOR]