Abstract

The Front Cover shows the single-crystal X-ray structure of methanesulfonamide and its protonated species. The protonation of methanesulfonamide and the isolation of corresponding salts succeeded for the first time with the superacidic systems HF/SbF5 and HF/AsF5. In the background of the cover picture a typical reaction vessel containing colourless crystals of [CH3SO2NH3]+[Sb2F11]– is shown. The structure analyses revealed a remarkable elongation of the sulfur-nitrogen bond due to the protonation. The reason is explained in the article by Leitz et al. on page 1202 ff.

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