The structure of tetramethylammonium trifluoromethanesulfonate, C4H12N+·CF3SO3−, was determined at 110 K in the monoclinic space group P21/m. The salt, which contains two cations and two anions in the asymmetric unit, has a network structure displaying C—H...O hydrogen bonding. Both the cation and the anion lie on special positions (mirror planes).
