Steric Hindrance in Highly-Substituted Organosilicon Compounds. I. The Reaction of Aryllithium Compounds With Some Chlorosilanes, Ethoxysilanes, and Related Compounds

Synthesis, characterization, and alkyne cyclotrimerization chemistry of titanium complexes supported by calixarene-derived bis(aryloxide) ligation

“…Alkynes were purchased from Aldrich or GFS Chemicals, Inc. and were distilled from CaH 2 prior to use. Calix [4]arene [34], p-methylcalix [4]arene [35], C 14 H 10 Mg(THF) 3 [20], and (o-MeC 6 H 4 ) 2 SiCl 2 [36] were prepared by literature methods. All other chemicals were purchased from Aldrich Chemical Co. and used without further purification (unless otherwise stated).…”

Study on the Mechanism of a Side Coupling Reaction during the Living Anionic Copolymerization of Styrene and 1-(Ethoxydimethylsilyphenyl)-1-phenylethylene (DPE-SiOEt)

“…In 1950, silyl ethers were reported to be nucleophilically cleaved by organolithiums, as shown in Equation (1) [29] Si−OR+R′Li→Si−R′+RO−Li…”

Preparation and characterization of telechelic poly(methyl methacrylate). 2. Anionic polymerization with a difunctional initiator derived from 4-[2-(tert-butyldimethylsiloxy)ethyl]-.alpha.-methylstyrene

“…Monomers and Solvents. THF used for the preparation of the initiator and the polymerization was purified in the same way as has been reported previously.8•9 Methyl methacrylate (MMA) and «-methylstyrene ( -MeSt) were purified by distillation from calcium hydride and the sodium salt of n-octylbenzophenone, respectively, as have been reported elsewhere.2•9 •10 The monomers were redistilled carefully and diluted to about [10][11][12][13][14][15][16][17][18][19][20] v/v % with purified THF just prior to polymerization. Carbon dioxide (purity, 99.99% or higher) packed in a glass ampule equipped with a break-seal was obtained from Takachiho Syoji Co., Ltd.…”