PREPARATION OF 1,2,4,4-TETRAMETHYL-3,5-DIMETHYLENECYCLOPENTENE; THE MAGENTA SPECIES DERIVED FROM IT BY PROTONATION AND FROM HEXAMETHYLCYCLOPENTADIENE BY HYDRIDE ABSTRACTION
Inductive effects in neighboring-group participation. Destabilization of carbocations by CC double bonds in solvolyses of 2,2,5,5-tetramethylcyclopent-3-en-1-yl tosylates