Dibora[2]ferrocenophane: A Carbene-Stabilized Diborene in a Strained cis-Configuration
详细信息 查看全文
- 作者：Prof. Dr. Holger Braunschweig ; Dr. Ivo Krummenacher ; Dr. Crispin Lichtenberg ; James D. Mattock ; Dr. Marius Schä ; fer ; Uwe Schmidt ; Dr. Christoph Schneider ; Thomas Steffenhagen ; Dr. Stefan Ullrich and Dr. Alfredo Vargas
- 刊名：Angewandte Chemie International Edition
- 出版年：2017
- 出版时间：January 16, 2017
- 年：2017
- 卷：56
- 期：3
- 页码：889-892
- 全文大小：756K
- ISSN：1521-3773
文摘
Unsaturated bridges that link the two cyclopentadienyl ligands together in strained ansa metallocenes are rare and limited to carbon–carbon double bonds. The synthesis and isolation of a strained ferrocenophane containing an unsaturated two-boron bridge, isoelectronic with a C=C double bond, was achieved by reduction of a carbene-stabilized 1,1′-bis(dihaloboryl)ferrocene. A combination of spectroscopic and electrochemical measurements as well as density functional theory (DFT) calculations was used to assess the influence of the unprecedented strained cis configuration on the optical and electrochemical properties of the carbene-stabilized diborene unit. Initial reactivity studies show that the dibora[2]ferrocenophane is prone to boron–boron double bond cleavage reactions.