Solvothermal syntheses and crystal structures of two metal coordination polymers with double-chain structures

• Published in: Polyhedron Vol. 20; no. 28; pp. 3287 - 3293
• Main Authors: Shi, Qian, Cao, Rong, Sun, Dao-Feng, Hong, Mao-Chun, Liang, Yu-Cang
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15.12.2001
• Subjects: 1,2,4,5-Benzenetetracarboxylate; Cadmium(II) complexes; Copper(II) complexes; Double-chain; Supramolecule; Supramolecule; 1,2,4,5-Benzenetetracarboxylate; Double-chain; Copper(II) complexes; Cadmium(II) complexes
• ISSN: 0277-5387
• DOI: 10.1016/S0277-5387(01)00945-7

Two polymeric complexes, [Cu 2(btec)(phen) 2] n ·(H 2O) n ( 1) and [Cd 4(btec) 2(phen) 4(H 2O) 4] n ( 2) (H 4btec=1,2,4,5-benzenetetracarboxylic acid; phen=1,10-phenanthroline), were synthesized by solvothermal reactions at 140 °C. Both complex 1 and 2 possess infinite double-chain structures, in which each Cu(II) center has a tetrahedral configuration and the Cd(II) centers adopt triangular prismatic and square-based pyramidal configurations simultaneously. The inter-chain face to face π–π interactions among the aromatic rings of phen and the hydrogen bond interactions between aqua molecules and carboxyl O atoms result in 3-D networks in the two complexes. The ESR spectra study of complex 1 shows that there is negligibly small long-range super-exchange interactions between the Cu(II) atoms via benzenecarboxylate bridging. Two polymeric complexes, [Cu 2(btec)(phen) 2] n ·(H 2O) n ( 1) and [Cd 4(btec) 2(phen) 4(H 2O) 4] n ( 2) were synthesized by solvothermal reactions, possessing infinite double-chain structures. The inter-chain face to face π–π interactions among the aromatic rings of phen and the hydrogen bond interactions between aqua molecules and carboxyl O atoms result in 3-D networks in the two complexes.