90(4)°, Z= 4, R(4 136, 446)= 0.0334. All compounds possess a structure of the ‘three-legged piano stool’ type, the major differences lying in the puckering of the metallacyclopentane rings which is larger in the dimethylated derivatives (1c) and (1f) than it is in (1e), where the metallacyclic moiety is rather flattened. The endocyclic Cβ–Cβ, bond in (1e) is 1.34(3)Å, while it is 1.51(1) and 1.52(1)Å in
所述metallacyclopentanes [[图形省略1 H 2 }(η 5 -C 5我5)(PPH 3)] [(1B)M = RH,R = Me中,R'= H; (1c)M = Rh,R = R′= Me;(1e)M = Ir,R = Me,R′= H;(1f)M = Ir,R = R′= Me;(1g)M = Ir,R = Pr i,R'= H]是通过使适当的烷基化试剂M'[CH 2 CH(R)CH(R')CH 2 ] M'(M'= Li或
氯化镁)与式的二
氯化物[的MC1 2(η 5 -C 5我5)(PPH 3)]。配合物(1)通过元素分析,1 H nmr和质谱法表征。已经确定了(1c),(1e)和(1f)的X射线晶体结构。(1c)和(1f)给出同构的P 2 1 / c晶体,而(1e)在空间群C 2 / c中结晶。像元常数为:(1c),a = 14.982(9),b = 11.058(6),c