
%0 Journal Article
%A Jeffery, EA 
%A Mole, T 
%T Trimethylaluminium: Scrambling of methyl groups in the dimer and exchange with trimethylgallium
%J Australian Journal of Chemistry
%D 1969/06/01
%V 22
%N 6
%P 1129-1136
%K 
%R https://doi.org/10.1071/CH9691129
%U https://www.publish.csiro.au/paper/CH9691129 
%X Interchange of methyl groups between the bridging and terminal positions of trimethylaluminium dimer and exchange of methyl groups between trimethyl- aluminium and trimethylgallium in cyclopentane have been re-examined, again by means of proton magnetic resonance spectroscopy. Dissociation of the dimer is confirmed as the rate- determining step in both cases, but the rate of dissociation is much greater in toluene than in cyclopentane. The evidence previously put forward for a cage effect limiting the rate of exchange with trimethylgallium in cyclopentane is refuted and a revised mechanism for exchange is suggested. 
