[Study on the spectroscopy of paramagnetic compounds [{Cu(bipy) [C6H4(COO)2]}2.H2O]n and [Cu(phen) [C6H4(COO)2]]n].
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 1688 cm(-1) disappeared while the complexes formed. The characteristic peaks of COO- group were splited into two peaks respectively that appeared at 1603, 1574 cm(-1) (vasCOO) and 1369, 1356 cm(-1) (vsCOO) in [{Cu(bipy)[C6H4(COO)2]}2.H2O]n, and at 1614, 1605 cm(-1) (vasCOO) and 1373, 1344 cm(-1) (vsCOO) 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.
Chen
Rui-ping
RP
The Chinese Academy of Sciences, State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Fuzhou 350002, China.
Yang
Bing-ping
BP
Zeng
Hui-yi
HY
Zheng
Yu
Y
Dong
Zhen-chao
ZC