Stable carbocations. Part VIII. Fragmentation reactions of ferrocenylalkylium ions
Abstract
In solution in trifluoroacetic acid, ferrocenylalkylium ions of the type Fc[graphic omitted]R·CH2X undergo fragmentation to X+ together with Fc[graphic omitted]RMe when X is an electrofugal group forming a sufficiently stable cation, e.g., when X = FcCRMe or Ph3C but not when X = Me3C or p-MeO·C6H4·CH2.