Abstract
The synthesis, single-crystal X-ray structure and magnetic properties of [Cu 3L 2Cl 2(DMF) 4] n ( 1), where L 2− is the 2,3-dioxyquinoxalinate(-2) ligand, are reported. The complex was prepared by the reaction of CuCl 2 and 1,4-dihydro-2,3-quinoxalinedione (H 2L′) under basic conditions using either solvothermal or normal laboratory techniques. Compound 1 is a 3D coordination polymer with an (8 2.10)-a, lig (LiGe) topology, containing the ligand in a novel 3.1111 (Harris notation) coordination mode. Variable-temperature and variable-field magnetic studies reveal that the ligand L 2− propagates weak antiferromagnetic exchange interactions through its “quinoxaline” part. IR data are discussed in terms of the structural features of 1 and the coordination mode of L 2−.
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