Triflate's bigger brother: The unprecedented tribrate anion, [Br CSO ].

The synthesis of the unprecedented [Br CSO ] anion starts with the bromination of phenylmethanesulfonate, C H OSO CH , with KOBr leading to C H OSO CBr . The formation of the [CBr ] moiety has been proved, also by an X-ray structure determination of the compound (triclinic, P-1, a=685.9(2), b=698.

Trichlates, an Unattended Class of Compounds: Characterization of Cl CSO Cl, and (H O )[Cl CSO ].

Chlorination of CS leads to trichloromethanesulfenyl chloride, Cl CSCl, in moderate yields. The oxidation of Cl CSCl with H O gives Cl CSO Cl, the chloride of trichloromethanesulfonic acid. Cl CSO Cl is the crucial product for the preparation of trichloromethanesulfonates ("trichlates") and has been characterized by IR spectroscopy, differential scanning calorimetry (DSC) and X-ray diffraction measurements (P-1, a=609.