apparent cyclometalation of 4b to give 4e is reversible. While the base-stabilized zwitterion 5a·CH3CN was successfully prepared (83%), attempts to generate the coordinatively unsaturated zwitterion Cp*Ru(κ2-P,N-1) (5a) instead resulted in the formation of the isomeric hydridocarbenes 5b (80%) and 5c (84%). The apparent rearrangement of 5a to a hydridocarbene is noteworthy, as it represents a remarkably facile
的合成,表征,和反应性新的CP * Ru配合物支持的属性由κ 2 - P,Ñ -1-P我PR 2 -2-NME 2 -
茚(1A),κ 2 - P,Ñ -2- NME 2 -3-P我PR 2 -
茚(1B),和κ 2 - P,Ñ -2- NME 2 -3-P我PR 2 -indenide(1)中有所描述(CP * =η 5 -C 5我5)。加入1A至(CP *的RuCl)4得到的CP *的Ru(Cl)的(κ 2 - P,ñ - 1A)(图2a,92%),这反过来又转化的CP *的Ru(Cl)的(κ 2 - P,N - 1b)(2b,85%)。用
乙腈中的AgBF 4处理2a或2b可提供相应的18电子,碱稳定的阳离子[CP * Ru(
CH3 CN)(κ 2 - P,Ñ - 1A,b)] + BF 4 - (图3a,89%;图3b,91%)。为了追求类似的不含
乙腈的16电子物种(4a或4b),将复合物2a或2b用Li(Et