The image shows a packed unit cell [H3O]3[HC(SO3)3], viewed along the crystallographic c-direction.
The authors present 16 novel compounds as the collected results of their investigations toward the methane(poly-)sulfonic acids [H4-xC(SO3)x] (x = 1–3) and their salts with group I and II cations. For the first time, the crystal structures of methanedisulfonic acid MDSA (1) and methanetrisulfonic acid MTSA (2 and 3) have been elucidated, showing that, starting from the reaction of acetone and oleum, the potassium salts of both acids are readily available and can be transferred into the respective oxonium salts, thus enabling neutralization reactions toward several different salts. For more details on characterization, analyses and the experimental section go to the ChemistryOpen article.