- Hydrosilylation process for gaseous unsaturated hydrocarbons
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Organosilicon compounds are prepared by the addition reaction of a gaseous unsaturated hydrocarbon with a silane or siloxane containing at least one silicon-bonded hydrogen atom in the presence of a hydrosilylation catalyst in a liquid reaction medium. In this process the unsaturated hydrocarbon and optionally the silane or siloxane is dispersed into the liquid reaction medium by a jet eductor (also known as a venturi pump) device and the resultant gas-in-liquid dispersion is introduced into a bubble reactor.
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Page/Page column 5
(2010/02/16)
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- PROCESS FOR PREPARATION OF ALKOXYSILANES
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An object of the present invention is to provide a process of producing alkoxysilanes, which does not use a chlorosilane as the intermediate raw material, is improved in view of the environment, and is satisfactory with respect to the yield of a desired material. The present invention is concerned with a process of producing an alkoxysilane including hydrosilylating (A) an organosilicon compound having at least one hydrogen-silicon bond and at least one alkoxy group and (B) an organic compound having a carbon-carbon unsaturated bond in vapor phase in the presence of a mixture containing a hydrosilylation catalyst and a polyalkylene glycol and supported on a carrier, thereby adding hydrogen and silicon of the compound (A) to the carbon-carbon unsaturated bond in the compound (B).
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- A novel catalyst containing a platinum complex in polyethylene glycol medium supported on silica gel for vapor-phase hydrosilylation of acetylene with trichlorosilane or trimethoxysilane
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Hydrosilylation of acetylene with trichlorosilane or trimethoxysilane was carried out using a vapor-phase flow reactor with use of tetraammineplatinum(II) chloride in polyethylene glycol medium supported on silica gel as a catalyst, which is an active and thermally stable supported liquid-phase catalyst prepared readily from easily available materials, tetraammineplatinum(II) chloride, polyethylene glycol and silica gel.
- Okamoto, Masaki,Kiya, Hironari,Yamashita, Hiromi,Suzuki, Eiichi
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p. 1634 - 1635
(2007/10/03)
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- Gas-Phase Reactions of Hexachlorodisilane with Vinyl Chloride and Allyl Chloride
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Gas-phase reactions of hexachlorodisilane with vinyl chloride and allyl chloride is studied. Dichlorosilylene generated from Si2Cl6 reacts with the above chloroalkenes mainly at the C-Cl bond to form alkenyltrichlorosilanes. The yields of vinyltrichlorosilane and allyltrichlorosilane are 45-63 and 49-81%, respectively. A mechanism of the reactions of Si2Cl6 with vinyl chloride and allyl chloride is proposed.
- Chernyshev,Komalenkova,Kapitova,Bykovchenko,Khromykh,Bochkarev
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p. 1447 - 1450
(2007/10/03)
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- Transition Metal Complexes of Troeger's Base and their Catalytic Activity for the Hydrosilylation of Alkynes
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Rhodium(III) and iridium(III) complexes of Troeger's base (TB), of structural type TB*2MCl3 (M=Rh, Ir), were prepared by treatment of TB with MCl3.The rhodium complex readily catalyzed the hydrosilylation of alkynes with high regio- and stereoselectively observed in some cases.
- Goldberg, Yuri,Alper, Howard
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p. 369 - 372
(2007/10/02)
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- PALLADIUM COMPLEXES IN THE HYDROSILYLATION OF ACETYLENE
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The catalytic activities of triphenylphosphine-, trialkylphosphine-, and acetylacetone-palladium complexes in the hydrosilylation of acetylene with trichloro-, alkyldichloro-, triethyl, and triethoxy-silanes were investigated.The yields of the corresponding (triorganylsilyl)ethylenes and 1,2-bis(triorganylsilyl)ethanes (conditions: 70-80 deg C, solvent xylene) depend on the nature of the ligands on the palladium atom and the character of the substituents on the silicon atom in the hydride silane.
- Kopylova, L. I.,Pukhnarevich, V. B.,Voronkov, M. G.
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p. 276 - 278
(2007/10/02)
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- Isomerization of 1-Butene Catalyzed by (η6-Arene)NiR2. A Very Active Homogeneous Catalyst System
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(η6-Arene)NiR2 (R = SiCl3, SiF3, C6F5) complexes exhibit very high catalytic activity for the isomerization of 1-butene, especially in bromobenzene solution.The isomerization is generally first order in both 1-butene and Ni complex.The catalytic activity decreases in the order SiCl3 > SiF3 > C6F5.The reaction rate in toluene solution increases with increasing 1-butene concentration below a ratio of 1-C4H8/Ni = 100 but decreases at higher ratios apparently due to induced decomposition of the Ni complex.However, the rate is not adversely affected by high 1-C4H8 concentration in bromobenzene solution.The ratio of cis-2-butene to the trans isomer is also dependent on solvent, suggesting that an important step in the mechanism is the involvement of solvent in the catalytic cycle.The reaction of ethylene with (η6-arene)Ni(SiCl3)2 gives vinyltrichlorosilane and ethyltrichlorosilane.A mechanism is proposed which involves the intermediacy of nickel hydride species generated by the insertion of 1-butene into the Ni-R bond followed by β-hydride elimination.
- Kanai, Hiroyoshi,Choe, Seok Burm,Klabunde, Kenneth J.
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p. 2019 - 2023
(2007/10/02)
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- THERMODYNAMICS AND KINETICS OF PROCESS FOR OBTAINING VINYLTRICHLOROSILANE BY THERMAL CONDENSATION.
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The synthesis of vinyltrichlorosilane (VTCS) by thermal condensation of vinyl chloride (VC) with trichlorosilane (TCS) is carried out in the gas phase at temperatures of 500-800 degree C with contact times of 0. 2-30 sec, the higher temperatures corresponding to short contact times and the lower temperatures to longer contact times. The objective of this work is the thermodynamic analysis and investigation of the kinetic relationships in the reactions.
- Florentsev,Mosin,Korshunov,Nosenko
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p. 343 - 347
(2007/10/02)
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- NMR STUDY OF THE ViXSiX4-x COMPOUNDS WITH X=Cl, Br; x=0, 1, 2, 3
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1H, 13C and 29Si NMR data for the compounds VixSiX4-x are reported.While the 1H and 13C resonances from the ? system are indicative of the electron-withdrawing inductive effect (-I) of the halogens, the 29Si chemical shift data reveal not only a shift contribution originating from this inductive effect but also the important influence of a *-?> hyperconjugation .This back-donation originates from the vinyl ? system and not from the halogens.The chemical shift data and the coupling constants also show an important influence from steric interaction and even from an electric field effect caused by polarization of the silicon-halogen bond.
- Delmulle, L.,Van Der Kelen, G. P.
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p. 289 - 292
(2007/10/02)
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- CONVENIENT LABORATORY SYNTHESIS OF VINYLIC SILICON COMPOUNDS VIA THE REACTIONS OF ACETYLENE WITH HYDROSILANES CATALYZED BY GROUP-VIII METAL PHOSPHINE COMPLEXES
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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.
- Watanabe, Hamao,Asami, Muneo,Nagai, Yoichiro
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p. 363 - 374
(2007/10/02)
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