“…Attempts at preparing alkenesulfonic acids from 3-methyl 1-pentene, and 2,3,3-trimethyl 1 butene (16) were unsuccessful. It should be noticed that 3,3-dimethyl-1 butene gives, after rearrangement, the same acid as 2,3-dimethyl 1-butene (I; R, R2, R3 = CH3), whereas in the former case, only a 3"sultone was mentioned by Robbins (16). In addition, the main product of the sulfonation of 2,4,4-trimethyl 1-pentene seems to be the (Z)-isomer of the 2-alkene sulfonic acid, rather than the 1-alkenesulfonic acid proposed by Bordwell and Osborne (11).…”