四甲基二硅桥连双环戊二烯基四羰基二铁的芳香异腈取代及热重排反应

Carbonyl Substitution by Aryl Isocyanides in (Me_2SiSiMe_2)[(C_5H_4)Fe(CO)_2]_2 and the Thermal Rearrangement Reaction

四甲基二硅桥连双环戊二烯基四羰基二铁与芳香异腈在苯中加热回流生成一个或两个羰基被芳香异腈取代的化合物(Me2 SiSiMe2 )(C5H4 )2 Fe2 (CO)4 -n(CNAr)n [Ar=C6 H5,n =1(1),n =2(2 );Ar=p MeC6 H4 ,n =1(3 ),n =2(4)].单异腈取代化合物 1和 3在二甲苯中加热均可发生热重排反应,生成相应的重排产物(Me2 SiC5H4 )2 Fe2 (CO)3 (CNAr)[Ar=C6 H5(5 ),p MeC6 H4 (6)].通过1HNMR,IR和元素分析表征了化合物 1～ 6的分子结构,并通过X射线衍射分析测定了化合物

The reaction between (Me_2SiSiMe_2)[C_5H_4Fe(CO)_2]_2 and aryl isocyanides under refluxing benzene afforded one or two aryl isocyanides substituted products (Me_2SiSiMe_2)(C_5H_4)_2Fe_2(CO)_ 4-n(CNAr)_n[Ar=C_6H_5, n=1 ([ST5HZ]1), n=2 (2); Ar=p-MeC_6H_4, n=1 (3), n=2 (4)]. The monoisocyanide substitution complexes . The monoisocyanide substitution complexes 1 and 3 could be rearranged to the corresponding rearrangement products (Me_2SiC_5H_4)_2Fe_2(CO)_3-(CNAr) [Ar=C_6H_5[KG*1/5] (5), p-MeC_6H_4 (6)] under refluxing xylene. The complexes under refluxing xylene. The complexes 1～6 were fully characterized by 1H NMR, IR spectra and elemental analyses. The crystal structure of complex 3 was determined by X-ray diffraction analysis.