A Pentacoordinate Boron-Containing 蟺-Electron System with Cl鈥揃鈥揅l Three-Center Four-Electron Bonds

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• 作者：Chuandong Dou ; Shohei Saito ; Shigehiro Yamaguchi
• 刊名：The Journal of the American Chemical Society
• 出版年：2013
• 出版时间：June 26, 2013
• 年：2013
• 卷：135
• 期：25
• 页码：9346-9349
• 全文大小：286K
• 年卷期：v.135,no.25(June 26, 2013)
• ISSN：1520-5126

文摘

Tricoordinate boron-containing 蟺-electron systems are an attractive class of compounds with intense fluorescence and strong electron-accepting properties. However, the impact of pentacoordination of the boron atoms on their properties has not been determined. We now disclose a B,B鈥?bis(1,8-dichloro-9-anthryl)-substituted 9,10-dihydro-9,10-diboraanthracene as a new pentacoordinate organoboron compound. In this skeleton, with the aid of the orthogonal arrangement of the anthryl substituent, the B and Cl atoms can form a three-center four-electron (3c鈥?e) Cl鈥揃鈥揅l bond. The pentacoordination of the boron atom significantly perturbs the electronic structure and thereby the photophysical and electrochemical properties.