[(C6F5)2B‐(CH2)3‐Cp}(Cp‐PtBu2)ZrCl2] (6; Cp=cyclo‐C5H4) was prepared by hydroboration of [(allyl‐Cp)(Cp‐PtBu2)ZrCl2] (5) with HB(C6F5)2 (“Piers’ borane”). It represents a frustrated Lewis pair (FLP) in which both the Lewis acid and the Lewis base were attached at the metallocene framework. Its reaction with 1‐pentyne did not result in the 1,2‐addition of or deprotonation reaction by the FLP, but rather in
锆茂复合物[(C 6 F 5)2 B-(CH 2)3 -Cp}(Cp-P t Bu 2)ZrCl 2 ](6 ; Cp = cyclo-C 5 H 4)是通过对[(烯丙基-Cp)(Cp-P t Bu 2)ZrCl 2 ](5)与HB(C 6 F 5)2(“ Piers'borane”)。它代表沮丧的路易斯对(FLP),其中
路易斯酸和路易斯碱都连接在茂
金属骨架上。它与
1-戊炔的反应不会导致FLP的1,2-加成或去质子反应,而是三键的1,1-碳环化,从而获得Z / E混合物(1.2:1)各自的有机
金属取代的烯烃7。
1-戊炔与无
磷体系[(C 6 F 5)2 B-(CH 2)3 -Cp)} CpZrCl 2 [ 9 ]的类似反应给出了各自的1,1-碳化产物(Z ‐10/ E- 10≈1.3:1)。