A three-dimensional copper(II) coordination polymer featuring the 2,3-dioxyquinoxalinate(-2) ligand: Preparation, structural characterization and magnetic study

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• 作者：Konstantis F. Konidaris ; Giannis S. Papaefstathiou ; Guillem Aromi ; Simon J. Teat ; Evy Manessi-Zoupa ; Albert Escuer ; Spyros P. Perlepes
• 关键词：Coordination polymers ; Copper(II) polymers ; Crystal structure ; 1 ; 4-Dihydro-2 ; 3-quinoxalinedione ; 2 ; 3-Dioxyquinoxalinate(-2) metal complexes ; Magnetochemistry
• 刊名：Polyhedron
• 出版年：2009
• 出版时间：22 June 2009
• 年：2009
• 卷：28
• 期：9-10
• 页码：1646-1651
• 全文大小：426 K

文摘

The synthesis, single-crystal X-ray structure and magnetic properties of [Cu₃L₂Cl₂(DMF)₄]_n (1), where L²⁻ is the 2,3-dioxyquinoxalinate(-2) ligand, are reported. The complex was prepared by the reaction of CuCl₂ and 1,4-dihydro-2,3-quinoxalinedione (H₂L′) under basic conditions using either solvothermal or normal laboratory techniques. Compound 1 is a 3D coordination polymer with an (8².10)-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 L²⁻ 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 L²⁻.