and structurally characterized. The reaction process is based on both (i) the nucleophilic attack of tertiary phosphines on acetylenic reagents and (ii) the ability for 16-electron d0-zirconocene(IV) complexes to coordinate two electron donor ligands. We have shown that the nature of the heteroelement directly bonded to the triple bond of the terminal acetylenic system directs the nucleophilic attack
各种稳定的五配位的
有机锆-吃络合物,2 - 4,9,图12A,b,16,和18,已经制备和结构表征。反应过程基于(i)叔膦对炔属试剂的亲核攻击以及(ii)16电子d 0的能力-
锆茂(IV)络合物配位两个电子给体
配体。我们已经表明,直接结合到末端炔属系统的三键上的杂元素的性质指导了膦的亲核攻击;在所有情况下,仅观察到一种区域异构体。令人惊讶地,在膦的亲核攻击1A上发生炔丙基衍
生物19 - 21,得到相应的两性离子复合物
锆22 - 24。测试了12a与HCl和MeI的反应性。