An analysis of the initial rates of reaction was carried out of the aluminium bromide catalyzed isomerization of 1-propyl bromide: 1-C 3 H 7 Br + Al 2 Br 6 = 2-C 3 H 7 Br + Al 2 Br 6 The proposed kinetics of the process is consistent with a nucleophilic displacement of the aliphatic bromine contained in complexes of the alkyl bromide with aluminium bromide. The displacement, initiated by the AlBr 4 − ion, is accompanied by a rate determining 2,1 hydride shift.
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