R3SiMgMe and MnCl2 are disclosed. (1) The manganese species reacted with terminal acetylenes to give 1,2-disilylated 1-alkenes. Mono- and bis(trimethylsilyl) acetylenes gave tri- and tetrasilylated ethenes, respectively, in good yields. Highly strained tetrakis(trimethylsilyl) ethene has now become easily accessible by this technique. (2) The reaction of alkenyl halides, alkenyl sulfides, and enol phosphates
Platinum-catalyzed elimination—addition reactions of trisilylethenes
作者:Toshio Suzuki、Peter Y. Lo
DOI:10.1016/0022-328x(91)80078-x
日期:1991.1
isomerization—redistributiuon reactions catalyzed by platinum. Each of them is converted into its (Z)-isomer and ethenes bearing one trimethylsilyl group and two substituted silyl groups as major products. The proposed mechanism for the reactions involves a sequence of eliminations of hydrosilanes from the ethenes and re-addition to them. Oxygen greatly affects the reaction, apparently accelerating anti-elimination
d-orbitaleffekte in silizium-substituierten π-elektronensystemen VI. Spektroskopische untersuchungen an alkyl- und silyläthylenen
作者:Hans Bock、Hans Seidl
DOI:10.1016/s0022-328x(00)88859-2
日期:1968.7
13 alkyl- and silylethylenes have been synthesized to determine their vertical ionization energies, characteristic IR frequencies, 1H NMR signals, π → π* electronic transitions, halfwave reduction potentials and ESR spin densities of their radical anions. The result confirm d/π interactions in the ground state and d/π interactions in the excited state of silylethylene-π-electron systems. The inductive
已经合成了13种烷基和甲硅烷基乙烯,以确定它们的垂直阴离子的垂直电离能,特征红外频率,1 H NMR信号,π→π*电子跃迁,半波还原电势和ESR自旋密度。结果确认d在基态/π相互作用和d /π在silylethylene-π电子系统的激发态相互作用。感应极化+ I(SiR 3)> + I(CR 3)可以根据R 3 SiCH 2基团的取代效应进行评估。
New aspects of platinum-catalyzed hydrosilylation of disilylethynes
作者:Toshio Suzuki、Peter Y. Lo
DOI:10.1016/0022-328x(90)80152-p
日期:1990.7
The platinum-catalyzed hydrosilylations of bis(trimethylsilyl)ethyne and 1-trimethylsilylethynyl-1,1,3,3,5,5,7,7,7-nonamethyltetrasiloxane at 130–150°C were investigated using high molecular weight organosilicon hydrides. In addition to the expected adducts, significant amount of unexpected disilylethynes and trisilylethenes were produced. It is suggested that the reaction sequence involves elimination
Unexpected products from the reductive trimethyl-silylation of bis(trimethylsilyl)acetylene
作者:Laverne C. Quass、Robert West、G. Ronald Husk
DOI:10.1016/s0022-328x(00)90593-x
日期:1970.1
6-tris(trimethylsilyl)-2,4,7-trisilaoctane (IV). Compound III was also obtained by the reductive trimethylsilylation of tris(trimethylsilyl)ethylene. The temperature dependent protonmagneticresonance spectra and other evidence for the structures of (III) and (IV) are discussed. A mechanism for the formation of (III) and (IV) involving an intramolecular metalation competing with metalation of trimethylchlorosilane