In molecules with conformational flexibility, it has been shown the dependency of the electrostatics on the conformation of the molecule, and how defining polarizable groups within the same molecule improves the polarizable force field description of possible conformers. To account for internal polarization, in each of the starting structures, the methyl group bonded to its corresponding nitrogen, the imidazolium ring, each methylene, and the methyl of the alkyl chain were considered as individual polarization groups. This means that the number of polarizable groups in a specific cation depends on the number of carbons contained in each alkyl chain. Figure shows the imidazolium-based cations taken as starting structures for the rest of the cations built with the proposed approach. Figure shows a schematic representation of the parametrization of 1-hexyl-3-methylimidazolium [6MIm] from the existing parameters.