formed upon interaction of tetraalkoxydiboranes and a Lewis base, can attack non‐activated CC bonds. Computational studies identify the interaction as the overlap between the strongly polarized BB σ bond (HOMO) and the antibonding π* orbital (LUMO) of the CC bond. Conceptually, the normally electrophilic boron becomes nucleophilic and forces the olefin to act as an electrophile.
行为变化:四烷氧基二
硼烷与路易斯碱相互作用形成的亲核性sp 2卡宾型
硼基部分可以攻击未活化的CC键。计算研究确定的相互作用作为强烈极化B之间的重叠乙σ键(HOMO)和CC键的反键π*轨道(LUMO)。从概念上讲,通常的亲电子
硼变成亲核的,并迫使烯烃起亲电子的作用。