Transmetalation of main group metal compounds

The 2 1 molar reactions of trimethylaluminum and triphenylaluminum occurs at room temperature to afford the dimethyl(phenyl)aluminum which is stabilized by bridging phenyl ligands bonded to two Al centers symmetrically (Eq. 5.74) [226]. 

Theoretical and experimental studies on the reaction of allylzinc compounds with vinylmagnesium (or other organometallic compounds with vinyl-metal bond) revealed details of the reaction involving transmetalation. The reagents prepared from a combination of allylzinc and vinylmagnesium bromide are doubly trapped 

Transmetalation forms new metal-carbon bonds under mild conditions. It serves to alter the reactivity of the organometallic intermediates in the metal complex-promoted synthetic organic reactions. The recent studies of the transmetalation have replaced previously postulated and obscure mechanisms of several metal complex-promoted synthetic organic reactions with the more convincing mechanism based on the precise description of the transmetalation reactions. This chapter intended to concentrate on the activation and formation of metal-carbon 

0-bond by transmetalation and skipped other topics such as intermolecular transfer of carbene [231] and Cp ligands. Since transmetalation would occur between the 

Transition Metal Alkyl Complexes Main-group Transmetallation and Insertion Chemistry in Comprehensive Organometallic Chemistry II, Vol. 12, Pergamon, Oxford, 1995, p. 131. 

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