One-electron oxidation of a stable tris[di-tert-butyl(methyl)silyl]silyl radical by the triphenylmethylium ion produces the corresponding silylium ion 2. However, this underwent a rapid intramolecular methyl group migration to form a more stable silylium ion 4 via a Wagner–Meerwein type rearrangement. The facile 1,3-methyl migration over the three peripheral silicon atoms in 4 was observed in NMR time scale.
三苯甲基离子对稳定的三[二叔丁基(甲基)
硅基]
硅基自由基进行单电子氧化,生成相应的
硅基离子2。然而,通过瓦格纳-米尔韦因型重排,甲基在分子内快速移动,形成更稳定的
硅基离子4。在核磁共振时间尺度下,观察到4中三个外围
硅原子上发生了简单的1,3-甲基移动。