75645-34-0Relevant academic research and scientific papers
H2OsCl6 AS CATALYST IN HYDROSILYLATION REACTIONS
Kopylova, L. I.,Lukevits, E.,Voronkov, M. G.
, p. 397 - 402 (2007/10/02)
Hydrosilylation of monosubstituted acetylenes RCCH (R = Bu, Ph) with triethyl-, triethoxy-, dialkylchloro-, or alkyldichlorosilanes, catalyzed by H2OsCl6*6H2O, yields three adducts: internal (α) and two terminal (β) cis and trans stereoisomers, the latter being predominant.Hydrosilylation of ClCH2CCH occurs stereospecifically, giving, along with the prevailing α adduct, trans-β adduct as well.The reactivity of RnSiHX(3-n) in the hydrosilylation decreases in the following order: Me2SiHCl > MeSiHCl2 > EtSiHCl2 >> (EtO)3SiH > Et3SiH.Increase in the electron density on the multiple bond and solvent polarity accelerates the reaction and increases the total yield of the reaction products.Addition of Ph3P and MeCN inhibits hydrosilylation.
RUTHENIUM COMPLEXES IN HYDROSILYLATION REACTIONS OF UNSATURATED COMPOUNDS
Kopylova, L. I.,Pukhnarevich, V. B.,Khan, M. M. Tagi,Voronkov, M. G.
, p. 605 - 608 (2007/10/02)
The reactions of trichloro-, alkyldichloro-, triethyl-, and triethoxy-silanes with phenylacetylene catalyzed by Ru(CO)3(PPh3)3, RuH2(CO)(PPh3)3, RuHCl(CO)(PPh3)3, and CpRuCl(PPh3)2, lead mainly to the formation of the terminal adducts PhCH=CHSiRnX3-n (mixtures of the cis and trans isomers).In the case of triethyl- and triethoxy-silanes products of dehydrocondensation PhCCSiR and hydrogenation PhCH2CH2SiR3 (R = Et, OEt) are formed.
HYDROSILYLATION REACTION OF UNSATURATED COMPOUNDS IN THE PRESENCE OF PALLADIUM COMPLEXES
Kopylova, L. I.,Pukhnarevich, V. B.,Tkach, V. S.,Voronkov, M. G.
, p. 904 - 909 (2007/10/02)
The hydrosilylation of 1-hexyne, phenylacetylene, 2-propynyl acetate, 2-propynyl chloride, 1-heptene, and styrene with trichloro-, alkyldichloro-, methyldichloro-, triethyl-, and triethoxysilanes, catalyzed by Pd(0) and Pd(II) complexes, was studied.The hydroxysilylation reaction goes stereospecifically to give two regioisomers, internal (α) and trans-terminal (β), the content of the latter being predominant.The reaction rate grows with increase in the electron-donor power of the ligands on the palladium atom, and with increase in the electronegativity of the substituents on the silicon atom (excluding HSiCl3), in the electron density of the multiple bond, and in the polarity of the solvent.
