One of them is formed in the intermediate stages of the Stevens rearrangement. Dimsyl sodium  generates these compounds in a DMSO solution, and the Corey-Chaykofsky reagent is a sulfonium  variety of them used to prepare epoxides. The best known of t
One of them is formed in the intermediate stages of the Stevens rearrangement. Dimsyl sodium  generates these compounds in a DMSO solution, and the Corey-Chaykofsky reagent is a sulfonium  variety of them used to prepare epoxides. The best known of these (*) dipolar compounds is probably the phosphonium variety. For 10 points— identify these molecules which help convert an aldehyde or a ketone to an alkene in the Wittig reaction.
One of them is formed in the intermediate stages of the Stevens rearrangement.
ylides