5507-44-8Relevant articles and documents
A novel organometallic route to phenylethenyl-modified polysiloxanes
Ganicz, Tomasz,Kowalewska, Anna,Stanczyk, Wlodzimierz A.,Butts, Matthew,Nye, Susan A.,Rubinsztajn, Slawomir
, p. 611 - 619 (2005)
We have synthesized a series of cyclic and linear siloxane materials with phenylethenyl substituents via transition metal complex-catalyzed coupling of the respective vinylsiloxane systems with styrene and α-methylstyrene. It has been shown that the non-carbene metal catalysts [RuCl(H)(CO)(PPh 3)3] and [RuCl(SiMe3)(CO)(PPh3) 2] are the most effective ones, pointing to a silylative coupling pathway as the most plausible mechanistic route. The process was studied in the presence of a series of catalysts and styrene polymerization inhibitors under different reaction conditions, leading to useful silicone materials characterized by high refractive index values ranging from 1.51 to 1.59 due to strong π-conjugation in side chain substituents.
Process for preparing low-chloride or chloride-free alkoxysilanes
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, (2008/06/13)
A process for preparing an alkoxysilane with an acidic chloride content of less than 10 ppm by weight, comprising: reacting a chlorosilane with an alcohol in a water-free and solvent-free phase to form a product mixture containing alkoxysilane and residual acidic chloride, with removal of resultant hydrogen chloride from the product mixture, then adding liquid or gaseous ammonia, in an amount corresponding to a stoichiometric excess, based on the content of acidic chloride, to form an ammonia-containing product mixture, treating the ammonia-containing product mixture at a temperature between 10 and 50 DEG C., wherein the ammonia and acidic chloride undergo neutralization, to form a crude product, and optionally, then separating off a salt formed in the course of neutralization, from the crude product, and recovering the alkoxysilane by distilling the crude product.
CONVENIENT LABORATORY SYNTHESIS OF VINYLIC SILICON COMPOUNDS VIA THE REACTIONS OF ACETYLENE WITH HYDROSILANES CATALYZED BY GROUP-VIII METAL PHOSPHINE COMPLEXES
Watanabe, Hamao,Asami, Muneo,Nagai, Yoichiro
, p. 363 - 374 (2007/10/02)
The hydrosilylation of acetylene (HCCH) with trichlorosilane, triethoxysilane, methyldichlorosilane, methyldiethoxysilane and -hexyldichlorosilane in an inert solvent in the presence of various phosphine complexes of Group-VIII metals such as Ru, Rh, Pd and Pt, as well as chloroplatinic acid, was investigated.Among the complexes studied, RuCl2(PPh3)3, PtCl2(PPh3)2, RhCl(PPh3)3, RhH(PPh3)4 and Pt(PPh3)4 were found to be the catalysts of choice for the selective syntheses of vinyltrichlorosilane, vinyltriethoxysilane, methylvinyldichlorosilane, methylvinyldiethoxysilane and -hexylvinyldichlorosilane, respectively.
