Chain Compounds Based on Tetranuclear Basic Copper(II) Carboxylate Clusters and Quadruple Zwitterionic Linkers: Structures and Magnetic Properties

• Published in: European Journal of Inorganic Chemistry Vol. 2010; no. 8; pp. 1249 - 1254
• Main Authors: Zhang, Xiu-Mei, Wang, Yan-Qin, Gao, En-Qing
• Format: Book Review Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01.03.2010; WILEY‐VCH Verlag
• Subjects: Carboxyl­ate ligands; Coordination polymers; Copper; Magnetic properties; Zwitterions
• ISSN: 1434-1948; 1099-0682
• DOI: 10.1002/ejic.200901121

Two CuII complexes with the new zwitterionic ligand 1‐carboxymethylpyridinio‐3‐benzoate (L), [Cu4L4(OH)2](ClO4)2·8H2O (1) and [Cu4L4(OH)2]Cl2·8H2O (2), have been synthesized and characterized crystallographically and magnetically. The two compounds contain isostructural chains, in which the anionic basic copper(II) carboxylate clusters [Cu4(μ3‐OH)2(RCOO)8]2– are quadruply interlinked by cationic organic spacers. Magnetic analyses using a tetranuclear model indicate that antiferromagnetic interactions between neighboring copper(II) ions are operative through the double hydroxo bridges and the mixed hydroxo/carboxylato bridges. The anionic basic copper(II) carboxylate clusters [Cu4(μ3‐OH)2(RCOO)8]2– are quadruply interlinked by cationic pyridinium spacers to give one‐dimensional chains; the hydroxo and carboxylato bridges mediate antiferromagnetic interactions within the cluster.