A new preparation of W(CO)5(PH3) (1) in fair yield on a multigram scale has been devised. 1 is metalated by one equivalent of n-BuLi to give W(CO)5 (PH2Li) (2), which reacts with various electrophiles: with alkyl halides W(CO)5(PH2R) complexes are obtained, but with other electrophiles the species W(CO)5(PHR2) is also obtained along with 1. Disubstituted complexes can also be obtained when 1 is treated
已经设计了一种新的W(CO)5(PH 3)(1)的新制备方法,其克级数可达到数克。1通过一当量的n-BuLi
金属化得到W(CO)5(PH 2 Li)(2),它与各种亲电试剂反应:与烷基卤化物一起获得W(CO)5(PH 2 R)络合物,但是与其他亲电试剂,物种W(CO)5(PHR 2)也与1一起获得。当1为1时,也可以得到双取代的配合物。先用过量的n-BuLi处理,再用过量的亲电试剂处理。通过假定多取代的化合物是通过逐步取代较少取代的配合物而获得质子取代的,而不是通过W(CO)5(RPLi 2)或W(CO)5(PL 3)等多片化的配合物而得到的。还实现了从1到高产率的一锅制备W(CO)5 [P(SiMe 3)3 ] 。中间体W(CO)5 [LiP(SiMe 3)2 ]也由1制成,与BrCH 2 Cl反应,然后
水解,得到(CO)5 W(PH 2 CH 2 PH 2)W(CO)5。