4-addition products undergo disproportionation with loss of N2 to yield the hafnocene alkyl halide complexes (η5-C5Me4H)2Hf(R)X along with concomitant regeneration of the strongly activated side-on dinitrogen complex [(η5-C5Me4H)2Hf]2(μ2, η2, η2-N2). This rearrangement is sensitive to both the halide and the alkyl substituents, where smaller groups undergo the most rapid rates of reaction, likely due
尝试在官能化[(η侧上协调二氮
配体5 -C 5我4 1H)2的Hf] 2(μ 2,η 2,η 2 -N 2加入甲基卤化物如CH的)3 X( X = Cl,Br,I)或烷基卤化物(RX = CH 3 CH 2 Br,CH 3 CH 2 I和CH 3 CH 2 CH 2 Cl)导致1,4-加成产生亚稳定的,弱活化的f茂末端-on二氮络合物,[(η 5 -C 5我41H)2化合物Hf] [(η 5 -C 5我4 1H)2 HFR](μ 2,η 1,η 1 -N 2)。甲基
碘加成的产物,[(η 5 -C 5我4 1H)2 HFI] [(η 5 -C 5我4 1H)2 HfCH 3 ](μ 2,η 1,η 1 -N 2)为在结构上表征并确认了N 2的触觉
配体。自由基钟
6-氯-1-己烯和
氯甲基环丙烷的加成也分别产生1,4-加成产物,同时伴随有环化和开环。与此相反,治疗[(η的5 -C 5我4 1H)2的Hf]