A Stable Magnesium Bromosilylenoid: Transmetalation of a Lithium Bromosilylenoid by Magnesium Bromide

Abstract

The reaction of lithium bromosilylenoid with MesLi at −10 °C followed by addition of MgBr 2 gave lithium mesitylsilylenoid as a complex with magnesium bromide that was transmetalated by MgBr 2 at 45 °C in THF to give magnesium silylenoid as a weak MgBr 2 complex of trisylmesitylsilylene. A new magnesium mesitylsilylenoid species was stable at reflux temperature in THF and n -hexane and showed amphiphilic properties in the reaction with 2-propanol, water, and n BuLi, respectively.