The process begins with ionization of pyrophosphate, giving a cyclopropylcarbinyl cation. The cation rearranges by a 1,2-migration of a cyclopropane C–C bond to the carbocation, forming the bond shown in blue to give a cyclobutyl carbocation. Subsequently, a second 1,2-migration occurs to form another cyclopropylcarbinyl cation, with the cation resting on a tertiary carbon.
The process starts with the ionization of pyrophosphate, resulting in the formation of a cyclopropylcarbinyl cation. The cation then undergoes a 1,2-migration to form a cyclobutyl carbocation, followed by another 1,2-migration to produce an additional cyclopropylcarbinyl cation, which is situated on a tertiary carbon atom in this specific reaction context.