77028-82-1Relevant articles and documents
Transition-State Geometry in the Ene Reactions of Mesoxalic Esters
Kwart, Harold,Brechbiel, Martin W.
, p. 3353 - 3355 (1982)
The evidence of a temperature-independent kH/kD value of 2.557 and a nearly identical inverse (kH/kD)value of 0.950-0.957 at the ? centers of allylbenzene strongly suggest a transition-state (TS) structure similar to that proposed for the highly reactive =S=N-.Here a symmetrically structured (2 + 2) charge-transfer complex is formed in a preliminary step, followed by a pseudopericyclic TS similar to that characterized previously for superene reactions.