Two novel one-dimensional coordination polymers [Cu2(μ-Br)2(pcaede)2 · 2H2O] n and [Cu2(μ-Br)2(pcaede)2 · 0.5THF · 0.5H2O] n formed via self-assembly of 4-pyridine-carboxylic acid 1,2-ethanediyl ester (pcaede) with copper(I) bromide |
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| Authors: | Song Li-Cheng Zhang Wen-Xiong Wang Jin-You Hu Qing-Mei |
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| Institution: | 1. Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, P.R. China
2. State Key Laboratory of Structural Chemistry, Fuzhou, 350002, P.R. China
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| Abstract: | Copper(I) bromide reacts with 4-pyridinecarboxylic acid 1,2-ethanediyl ester (pcaede) in wet Me2CO/DMSO or THF/DMSO mixed solvents to give two novel coordination polymers Cu2(μ-Br)2(pcaede)2 · 2H2O] n (1) and Cu2(μ-Br)2(pcaede)2 · 0.5THF · 0.5H2O] n (2), respectively. X-ray diffraction analyses revealed that (1) and (2) consist of infinite one-dimensional CuI ion chains, in which the consecutive three CuI ions are bridged respectively by two Br atoms and two pcaede ligands to form a string of alternately arranged four-membered Cu2Br2 rings and 30-membered Cu2(pcaede)2 rings. In addition, while in each repeated structural unit of (1) there are water molecules as guests, respectively located in a 30-membered ring and between two 30-membered rings in adjacent CuI ion chains, in (2) the two kinds of guest molecules 0.5THF and 0.5H2O lie respectively in the 30-membered ring and between the corresponding 30-membered rings in neighboring CuI ion chains. Structures of (1) and (2) were also characterized by i.r. spectroscopy, thermogravimetry and elemental analysis. |
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