Saul Winstein (October 8, 1912 – November 23, 1969) was a Jewish Canadian chemist who discovered the Winstein reaction.
[1] This fueled a debate with Herbert C. Brown over the existence of σ-delocalized carbocations.
Winstein also first proposed the concept of an intimate ion pair.
[2] He was co-author of the Grunwald–Winstein equation, concerning solvolysis rates.
[3] Richard F. Heck, who earlier in his career had undertaken postgraduate studies with Winstein, won the 2010 Nobel Prize in Chemistry.