WOO, HG KIM, SY KIM, WG YEON, SH CHO, EJ JUNG, IN 2024-01-21T20:17:04Z 2024-01-21T20:17:04Z 2022-01-10 1995-11-20 0253-2964 https://pubs.kist.re.kr/handle/201004/144912 Bis(silyl)alkylbenzenes such as bis(1-sila-sec-butyl)benzene (1) and 2-phenyl-1,3-disilapropane (2) were prepared in high yields by reduction of the corresponding chlorosilanes with LiAlH4. The dehydropolymerization of 1 and 2 was carried out with group 4 metallocene complexes generated in situ from Cp(2)MCl(2)/Red-Al and Cp(2)MCl(2)/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 (M(w) vs polystyrene) and from 500 to 900 (M(n) vs polystyrene). 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 polymer. English KOREAN CHEMICAL SOC BOND METATHESIS MECHANISM DEHYDROGENATIVE POLYMERIZATION PRIMARY ORGANOSILANES HIGH POLYMERS SILANES ZIRCONOCENE OLIGOSILANES TITANOCENE OLIGOMERS DEHYDROPOLYMERIZATION OF BIS(SILYL)ALKYLBENZENES TO HIGHLY CROSS-LINKED POLYSILANES, CATALYZED BY GROUP-4 METALLOCENE COMPLEX Article 1 BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.16, no.11, pp.1109 - 1112 BULLETIN OF THE KOREAN CHEMICAL SOCIETY 16 11 1109 1112 scie A1995TH37300024 Chemistry, Multidisciplinary Chemistry Article BOND METATHESIS MECHANISM DEHYDROGENATIVE POLYMERIZATION PRIMARY ORGANOSILANES HIGH POLYMERS SILANES ZIRCONOCENE OLIGOSILANES TITANOCENE OLIGOMERS dehydropolymerization