원문정보
초록
영어
Bis(silyl)alkylbenzenes such as bis(1-sila-sec-butyl)benzene (1) and 2-phenyl-1,3-disilapropane (2) were synthesized in high yields by the reduction of the corresponding chlorosilanes with LiAlH4 in diethyl ether. The dehydrocoupling of 1 and 2 was performed using group IV metallocene complexes generated in situ from Cp2MCl2/Red-Al and Cp2MCl2/n-BuLi (M = Ti, Hf), producing two phases of polymers. The TGA residue yields of the insoluble polymers were in the range of 64-74%. The molecular weights of the soluble polymers produced ranged from 700 to 5000 (Mw vs polystyrene using GPC) and from 500 to 900 (Mw vs polystyrene using GPC). The dehydropolymerization of 1 and 2 seemed to initially produce a low-molecular-weight polymer, which then underwent an extensive cross-linking reaction of backbone Si-H bonds, leading to an insoluble network polymer.
목차
2. Experimental Section
2.1. General Considerations
2.2. Monomer Systhesis
2.3. Synthesis of Bis(1-sila-sec-butyl)benzene (1)
2.4. Synthesis of 2-phenyl-1,3-disilapropane (2)
2.5. Polymerization of 1 Catalyzed by Cp2TiCl2/Red-Al
2.6. Polymerization of 1 Catalyzed by Cp2HfCl2/Red-Al
2.7. Polymerizaiton of 2 Catalyzed by Cp2HfCl2/n-BuLi
3. Results and Discussion
References