Disilene R*XSi=SiXR* (R*=SitBu3) mit siliciumgebundenen H- und Hal-Atomen X: Bildung, Isomerisierung, Reaktionen
作者:N Wiberg
DOI:10.1016/s0022-328x(00)00743-9
日期:2001.1.30
with benzophenone (formation of [2+2] cycloadducts), and/or with 2,3-dimethylbutadiene (formation of [2+2] and [4+2] cycloadducts as well as ene reaction products). Obviously, isomerization of the disilenes R*HalSiSiHalR* to silylenes R*Hal2SiSiR* is possible, the latter of which may be trapped by Et3SiH. In the absence of the mentioned traps, R*HSiSiHR* thermolizes under formation of cyclotrisilanes
1,2- disupersilyldisilanes R *ħDehalogenations 2 SiSiHalHR*,R *HHalSiSiHalHR*,R *HHalSiSiHal 2 R *和R *哈尔2 SiSiHal 2 R *,在THF与等摩尔量supersilyl钠的NaR *(R * = Si t Bu 3 = Supersilyl)在室温下(Hal = Cl)缓慢导引,甚至在-78°C(Hal = Br,I)下也导联,而将一种卤素Hal换成钠钠则变成黄色–橙disilanides R *ħ 2 SiSiNaHR*,R *HHalSiSiNaHR*,R *HHalSiSiNaHalR*和R *哈尔2 SiSiNaHalR*(通过质子化,甲基化,甲硅烷基化识别)。然后,在后三种情况下,这些可以消除反式形成下的NaHal具有与硅键合的H和Hal原子为X的-1