PHENOXYALUMINIUM COMPOUNDS. VI. COMPLEX AND REACTION MECHANISM OF METHYLALUMINIUM COMPOUNDS WITH ANISOLE

Article abstract of DOI:10.1016/S0022-328X(00)99359-8

The reactions of anisole with organoaluminium compounds Me_nAlX_n-1 have been investigated.The formation of a complex is the first reaction step, followed by cleavage and elimination of the gases MeX and small amounts of hydrocarbons.The yield of the gases and the cleavage rate decreases in the order: AlCl3>/=MeAlCl2>Me2AlCl>>Me3Al and Me2AlI>Me2AlCl>Me2AlBr.For most of the investigated reaction a marked decrease in gas evolution was observed after a short period of time.This is explained by the formation of an almost inactive mixed dimer (I) which at the <*> (I) reaction temperature is more stable than the Me2(Cl)Al:O(Me)Ph complex.It is suggested that dimer I is formed after the intramolecular reaction of the 2:1 complex II after elimination of MeX. <*> (II).