Deuterated isobutane was used for investigating the reaction mechanism.
High solubility of C4 leads to the induction period of ionic liquid very short.
The scission of C12+ plays an import role for forming trimethylpentanes.
Dimethylhexanes are formed primary by the alkylation of sec-C4H9+ with 2-butene.
The formation of light and heavy ends should be attributed to the C12+ cations.