A Sultone Derived from Racemic Camphene

A controversy about the structures of five-membered ring sultones obtained by treatment of camphenes with acetic and concentrated sulfuric acids has been resolved by X-ray analysis of the sultone obtained from racemic camphene, namely, endo-3H-10,10-dimethyl-4-oxa-5-thiatricyclo[5.2.1.0^3,7]decane S,S-dioxide, (also known as 10-bornanesulfonic acid 2-hydroxy-γ-sultone), C₁₀H₁₆O₃S. Five-membered saturated sultone rings are shown to be conformationally flexible.

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