The compounds (Me3Si)xCH(3−x)Cl (x = 1–3), (Me3Si)xCH(3−x)Br (x = 1, 3) and Me3SiCMe2Br have been found to react with 90% acetone or 80% ethanol at 70° at rates too small for convenient measurement. Towards aqueous acetone, the compound PhMe(Me3Si)CBr is 110 times less reactive at 50° than PhMe2CBr at 0°. It is concluded that relative to α-Me, α-t-Bu or α-Me3Si groups decrease the ease of formation
(Me 3 Si)x CH (3- x) Cl(x = 1-3),(Me 3 Si)x CH (3- x) Br(x = 1,3)和Me 3 SiCMe 2 Br的化合物具有已发现在70°下会与90%
丙酮或80%
乙醇以太小的速率反应,无法方便地进行测量。对于
丙酮水溶液,化合物PhMe(Me 3 Si)CBr在50°时的反应活性比在0°时的PhMe 2 CBr低110倍。可以得出结论,相对于α-ME,α -叔-卜或α-ME 3 Si基团降低容易形成碳离子的。