Study on the Spectroscopy of Paramagnetic Compounds [{Cu(bipy) [C6H4(COO)2]}2·H2O]n and [Cu(phen)[C6H4(COO)2]]n
CHEN Rui-ping, YANG Bing-ping, ZENG Hui-yi, ZHENG Yu，DONG Zhen-chao
The Chinese Academy of Sciences, State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Fuzhou 350002, China
Abstract：The cluster compounds with d9-d9 magnetic system were investigated because of their magnetic character. Some of the copper(Ⅱ) compounds with terephthalato as bridged unit, [{Cu(bipy)[C6H4(COO)2]}2·H2O]n and [Cu(phen)[C6H4(COO)2]]n, have been synthesized through a solvothermal reaction, and their crystal structures have been determined by X-ray diffraction. Their shape looks like zigzag-chain. In this paper, the molecular vibration spectra of the title complexes have been studied in detail. The middle and far-infrared spectra，and Raman spectra of the compounds have been reported and their assignments have been made experientially. The characteristic carbonyl absorption of terephthalato group at 1 688 cm-1 disappeared while the complexes formed. The characteristic peaks of COO- group were splited into two peaks respectively that appeared at 1 603, 1 574 cm-1(νasCOO) and 1 369, 1 356 cm-1 (νsCOO) in [{Cu(bipy)[C6H4(COO)2]}2·H2O]n, and at 1 614, 1 605 cm-1(νasCOO) and 1 373, 1 344 cm-1(νsCOO) in [Cu(phen)[C6H4(COO)2]]n. The relationship between the structures of the compounds and the spectra has been discussed as well. The coincidence between experiential assignments and the theoretic calculation will be confirmed.
[1] Evangelos G Bakalbassis, Anastasios P Bozopoulos et al. Inorg. Chem.，1988, 27：529. [2] Laura Deakin, Atta M Arif，Joel S. Miller, Inorg. Chem.，1999, 38：5072. [3] The Sadtler Standard Spectra. [4] 吴瑾光主编. 近代傅里叶变换红外光谱技术及应用. 北京: 科学技术文献出版社，1994. [5] WANG Xi-gui, WU Hong-ying, XIE Da-tao et al(王喜贵, 吴红英, 谢大等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2001, 21(6)：807.
