Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, and ‡NTU-CBC Crystallography Facility, Nanyang Technological University , 637371, Singapore.
J Am Chem Soc. 2018 Jan 31;140(4):1255-1258. doi: 10.1021/jacs.7b13068. Epub 2018 Jan 23.
In the presence of a catalytic amount of heavier tetrylene dichlorides, an allenic diborene 1 undergoes a 1,3-hydrogen shift to afford a terminal diborene 2, which can be deemed a boron analogue of vinylidene dication stabilized by Lewis bases. X-ray diffraction analysis and computational studies revealed that 2 involves a conjugative interaction between the C═C and B═B π-orbitals. The reaction of 2 with ZnBr afforded the corresponding isolable complex 3, in which two boon centers coordinate to the Zn atom asymmetrically.
在催化量的重四氯乙烷存在下，烯丙基二硼烯 1 经历 1,3-氢迁移，生成末端二硼烯 2，它可以被视为乙烯亚基二阳离子的硼类似物，由路易斯碱稳定。X 射线衍射分析和计算研究表明，2 涉及 C=C 和 B=B π 轨道之间的共轭相互作用。2 与 ZnBr 的反应得到相应的可分离配合物 3，其中两个硼中心不对称地与 Zn 原子配位。
