A Family of Octahedral Rhenium Cluster Complexes [Re6Q8(H2O)n(OH)6 - n<
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- 作者：Konstantin A. Brylev ; Yuri V. Mironov ; Spartak S. Yarovoi ; Nikolai G. Naumov ; Vladimir E. Fedorov ; Sung-Jin Kim ; Noboru Kitamura ; Yusuke Kuwahara ; Konatsu Yamada ; Shoji Ishizaka ; Yoichi Sasaki
- 刊名：Inorganic Chemistry
- 出版年：2007
- 出版时间：September 3, 2007
- 年：2007
- 卷：46
- 期：18
- 页码：7414 - 7422
- 全文大小：593K
- 年卷期：v.46,no.18(September 3, 2007)
- ISSN：1520-510X
文摘
The conversions of hexahydroxo rhenium cluster complexes [Re6Q8(OH)6]4- (Q = S, Se) in aqueous solutions ina wide pH range were investigated by chemical methods and spectroscopic measurements. Dependences of thespectroscopic and excited-state properties of the solutions on pH have been studied in detail. It has been foundthat a pH decrease of aqueous solutions of the potassium salts K4[Re6Q8(OH)6]·8H2O (Q = S, Se) results in theformation of aquahydroxo and hexaaqua cluster complexes with the general formula [Re6Q8(H2O)n(OH)6 - n]n - 4that could be considered as a result of the protonation of the terminal OH- ligands in the hexahydroxo complexes.The compounds K2[Re6S8(H2O)2(OH)4]·2H2O (1), [Re6S8(H2O)4(OH)2]·12H2O (2), [Re6S8(H2O)6][Re6S6Br8]·10H2O(3), and [Re6Se8(H2O)4(OH)2] (4) have been isolated and characterized by X-ray single-crystal diffraction and elementalanalyses and infrared (IR) spectroscopy. In crystal structures of the aquahydroxo complexes, the cluster units areconnected to each other by an extensive system of very strong hydrogen bonds between terminal ligands.