neighbors: Alkenylgold species with a heteroatom substituent are thought to be key intermediates in gold‐catalyzed trans additions of protic nucleophiles to alkynes. One reason for the scarcity of such compounds lies in the non‐innocence of the neighboring heteroatom, which may enforce the uptake of a second gold fragment with formation of surprisingly robust species with a gem‐digold unit adjacent to a largely
令人不安的邻居:具有杂原子取代基的链烯
金被认为是质子亲核体向
炔烃的
金催化反式加成反应的关键中间体。此类化合物稀缺的原因之一是相邻杂原子无毒,这可能会强制第二个
金片段的吸收,并形成令人惊讶的坚固物种,并在很大程度上靠近阳离子中心的地方形成一个宝石-
二氧化氮单元(请参见方案) )。