The formation of the spherical self-assembly of gold nanoparticles (AuNPs) of 200 ± 20 nm size at the water–chloroform interface is achieved by employing the cyclotetrasiloxane [RSCH2CH2SiMeO]4 (R = CH2CH2OH) as the stabilizing ligand. The interfacially stabilized AuNPs act as a versatile catalyst for selective hydrolytic oxidation of only one of the Si–H bonds in secondary organosilanes, RR1SiH2 (R
Conversion of hydrosilanes to alkoxysilanes catalyzed by Cp2TiCl2/nBuLi
作者:Thomas C. Bedard、Joyce Y. Corey
DOI:10.1016/0022-328x(92)83095-y
日期:1992.5
disiloxanes and trisiloxanes in addition to cyclopolysilanes are produced when R Me. Other protic reagents including acids, mercaptans, amines and enolizable ketones did not react. The effects of reaction parameters such as temperature, silane to catalyst ratio, solvent, transition metal and replacements for nBuLi were also determined.
Difunctional disilanes of the general type XR2SiSiR2X (1–5) (X = OMe, H; R = Me, Ph, H) have been synthesized by electrolysis of the appropriate chlorosilanes XR2SiCl in an undivided cell with a constant current supply and in the absence of any complexing agent. Reduction potentials of the chlorosilane starting materials derived from cyclic voltammetry measurements were used to rationalize the results
通用类型XR 2 SiSiR 2 X(1-5)(X = OMe,H; R = Me,Ph,H)的双官能乙硅烷是通过在恒定的不分隔电池中电解合适的氯硅烷XR 2 SiCl合成的在没有任何络合剂的情况下供电。由循环伏安法测量得出的氯硅烷原料的还原电位用于合理化制备性电解的结果。通式的MeO(ME的有机官能硅烷2)的SiC 6 H ^ 4 Y(图6a - Ç,7)随后通过反应得到的符号-对二甲氧基四甲基乙硅烷(1)在对位芳基溴化物BrC 6 H 4 Y(Y = OMe,NEt 2,NH 2)存在下具有NaOMe 。
The kinetics and mechanism of thermal decomposition of R1R2(H)SiOOR3 silylperoxides have been studied. It has been shown that peroxides generated diorganosilanones R1R2Si=O, with a high yield in the temperature range 130-180°C. A mechanism is suggested for the silanone formation. The interaction of si1anones with cyclosiloxanes, triethylsilane, α-methylstyrene has been investigated as well as the cyclisation
研究了R 1 R 2(H)SiOOR 3甲硅烷基过氧化物的热分解动力学和机理。已经表明,过氧化物在130-180℃的温度范围内以高产率产生了二有机硅酮酮R 1 R 2 Si = O。建议了一种机制来形成硅烷酮。已经研究了硅烷酮与环硅氧烷,三乙基硅烷,α-甲基苯乙烯的相互作用以及硅烷酮的环化。
Scalable Synthesis of Hydrido-Disiloxanes from Silanes: A One-Pot Preparation of 1,3-Diphenyldisiloxane from Phenylsilane
作者:Courtney Aldrich、Joseph Buonomo、Carter Eiden
DOI:10.1055/s-0036-1588580
日期:2018.1
Abstract A simple, one-pot, and high-yielding synthesis of 1,3-diphenyldisiloxane is presented. The preparation of similar symmetrical disiloxane materials is also accomplished with this same protocol. This mechano-chemical procedure is efficient and highly scalable, furnishing a convenient route to hydrido-disiloxanes from widely accessible commercially available silanes. A simple, one-pot, and high-yielding