Mixed-Valence State of Optically Active 1',1' ''-Bis(2-phenylbutyl)-1,1' '-biferrocenium Pentaiodide: Effects of Cation Symmetry and Intermolecular Interaction on Trapped-/Detrapped-Valence States

详细信息    查看全文

• 作者：Takashi Oda ; Satoru Nakashima ; and Tsutomu Okuda
• 刊名：Inorganic Chemistry
• 出版年：2003
• 出版时间：August 25, 2003
• 年：2003
• 卷：42
• 期：17
• 页码：5376 - 5383
• 全文大小：225K
• 年卷期：v.42,no.17(August 25, 2003)
• ISSN：1520-510X

文摘

The effects of cation symmetry and packing on the mixed-valence state of binuclear ferrocene derivatives arediscussed separately by using chiral isomers and racemic modification of 1',1' ''-bis(2-phenylbutyl)-1,1' '-biferroceniumpentaiodide. The pentaiodide anion has a polymeric structure and is composed of triiodide anion and iodine moleculeunits. The (R,S) isomer having an inversion center shows a detrapped-valence state even at 78 K. On the otherhand, the (R,R) and the (S,S) isomers having no inversion center show a trapped-valence state at room temperature.The racemic modification, however, consisting of the (R,R) and the (S,S) isomers shows a perfect detrapped-valence state at room temperature. This finding shows that the packing effect overcomes the effect of cationasymmetry.