Lu Wei, Li Yongxin, Kinjo Rei
Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences , Nanyang Technological University , 637371 , Singapore.
J Am Chem Soc. 2019 Apr 3;141(13):5164-5168. doi: 10.1021/jacs.9b02173. Epub 2019 Mar 25.
Reaction of a 1,2-diboraallene 1 with tetradibromodiborane BBr coordinated by a cyclic (alkyl)(amino)carbene (cAAC) in a 3:1 ratio affords a neutral tetraboron species 2 that possesses a planar tetraatomic boron(0) unit with the average oxidation state of zero. X-ray diffraction analysis and computational studies indicate that 2 features the delocalized electrons in the part of the σ-framework of the B unit, as well as the conjugated π-system over the C-B-C moiety.
1,2 - 二硼代丙二烯1与由环（烷基）（氨基）卡宾（cAAC）以3:1比例配位的四溴二硼烷BBr反应，生成中性四硼物种2，其具有平面四原子硼(0)单元，平均氧化态为零。X射线衍射分析和计算研究表明，2在B单元的σ骨架部分具有离域电子，以及在C - B - C部分上的共轭π体系。
