Allylmagnesium bromide

Allylmagnesium bromide is a Grignard reagent used for introducing the allyl group. It is commonly available as a solution in diethyl ether. It may be synthesized by treatment of magnesium with allyl bromide while maintaining the reaction temperature below 0 °C to suppress formation of hexadiene. Allyl chloride can also be used in place of the bromide to give allylmagnesium chloride. These reagents are used to prepare metal allyl complexes.