Rare-Earth-Catalyzed Selective Synthesis of Linear Hydridopolycarbosilanes and Their Functionalization
Wufeng Chen, Xiaojuan Liu, Jiajun Kong, Jianfeng Li, Yaofeng Chen, Chunming Cui
Abstract
Polycarbosilanes with SiH2 units in the main chain may undergo diverse reactions to access a family of functionalized polymers with enhanced added values. However, the preparation of such polymers has been hampered by uncontrollable side reactions involving Si–H bonds under transition-metal-catalyzed conditions. We described here the first selective bis-hydrosilylation of dienes with bis(hydrosilanes) enabled by rare-earth-metal catalysts to yield linear polycarbosilanes with SiH2 units in the chain. The Si–H bonds in the polymers could undergo halogenation, Si–O coupling, and hydrosilylation to yield a family of functionalized polycarbosilanes.
Topics & Concepts
HydrosilylationYield (engineering)CatalysisPolymerSurface modificationPolymer chemistryHalogenationChemistryTransition metalMetalRare earthMaterials scienceOrganic chemistryPhysical chemistryMineralogyMetallurgyOrganoboron and organosilicon chemistryCatalytic Cross-Coupling ReactionsSynthesis and characterization of novel inorganic/organometallic compounds