首页 | 本学科首页   官方微博 | 高级检索  
     


Polycondensation vs. cyclization of divinylsubstituted silicon compounds catalyzed by transition metal complexes
Authors:Bogdan Marciniec,Ewa Mał  ecka,Mariusz Majchrzak,Yujiro Itami
Abstract:In the presence of ruthenium complexes divinyldiorganosilicon compounds undergo de‐ethenated coupling polycondensation yielding under optimum conditions trans‐tactic polysilylene(siloxylene, silazanylene)vinylenes and poly(silylene‐arylene‐vinylenes). Rhodium‐ ([RhX(cod)]2 X = Cl, OSiMe3) catalyzed ring closure of oligomeric (dimeric, trimeric) products of intermolecular condensation opens a new route to synthesizing organosilicon exo‐cyclic methylenes. In the presence of Ru‐complexes the cross‐coupling (poly)condensation of di‐ and trivinylsilicon monomers with organic dienes allows syntheses of a series of linear and dendrimeric poly(arylene‐silylene‐vinylene)s.
Keywords:
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号