Organosilicon Compounds. V.¹ β-Eliminations Involving Silicon²

Abstract

June, 1946ORGANOSILICON COMPOUNDS :calculations, however, the constants directly determine from the compressibility data and presented in Table I should be used. It is to be remarked that the constants have compensating effect and that two sets of constants even with appreciable numerical differences may yield similar results so far as the compressibility, not the derivatives of the quantities, is concerned.Acknowledgment+The writers are grateful to Professor James A. Beattie and Professor Warren K. Lewis for their suggestions and encouragement. summary 1. A generalized form of Beattie-Bridgeman equation of state is proposed 8-ELIMINATIONS INVOLVING SILICON 1083 where e' 3 C ' l d S T 3 p / p , reduced pressure 8 3 T/T,, reduced temperature (p 3 V / Val, ideal reduced volume V, = RTJp,, ideal critical volume The constants A6, a', Bi, b' and c' have the same numerical values irrespective of nature of gas as follows Ab = 0.4758 Bo' = 0.18764 c' = 0.05 a' = 0.1127 b' = 0.03833 2. The proposed generalized equation holdsfor seventeen gases with an average deviation of 2% or less for each gas up to nearly the critical density. It is believed that the proposed equation may be applied in general to all real gases.a-Chloroethyltrichlorosilane with methylmagnesium bromide gives a-chloroethyltrimethylsilane with no attack on the alpha chlorine.8 CHsCHCISiClo + 3CHsMgBr + CHsCHClSi(CH&

Comparative Studies of Grafting and Direct Syntheses of Inorganic−Organic Hybrid Mesoporous Materials

“…Thus, the Si-C bond in a precursor should be hydrolytically stable under these circumstances. 22,23 The present study reports structural, chemical, and physical properties of vinyl-modified MCM-41 samples prepared by using both PSG and direct synthesis. The major features of this study are comparisons of products from both methods with respect to efficiencies of the synthetic routes, precursor effects, vinyl group concentrations, the locations of vinyl groups in the mesoporous products, the hydrothermal stability of vinyl-functionalized samples, and qualitative observations of solvent absorption properties.…”

“…However, one must be cautious in choosing precursors since the reaction involves basic conditions during the hydrothermal synthesis and acidic conditions during surfactant removal. Thus, the Si−C bond in a precursor should be hydrolytically stable under these circumstances. , …”

Chemical Insights into Antibacterial N-Halamines

“…reported the effect of UV light on halogen atoms that were bound to carbon atoms in alpha or beta positions with respect to a silicon atom. They found that with exposure to UVA light, the cleavage of the Si–C bond initiated the loss of the hydantoin units from the surface of the coated materials and consequently reduced the antimicrobial efficacy, as demonstrated in other literatures. − …”

Staged development of modified silicon dioxide films

“…A clear example is provided by the generation of ethylene from flchloroethlytrichlorosilane by based catalyzed nucleophilic elimination [1,2]. The reaction of siloxane networks with aqueous base initiated elimination of ethylene from fl-chloroethylsilsesquioxane with the formation of sodium silicate has been reported [3].…”