HOW DOES AN ALKOXY GROUP AT THE BENZYLIC CARBON AFFECT THE TRANSITION-STATE OF THE HYDROGEN-ATOM ABSTRACTION REACTION - CORRELATION-ANALYSIS OF RELATIVE RATES FOR 14 P-Y-SUBSTITUTED ALPHA,ALPHA-ETHYLENEDIOXYTOLUENES

Correlation analysis of the relative rates for the H-atom abstraction reaction of 14 2-(4-Y-phenyl)dioxolanes (p-Y-substituted alpha,alpha-e thylenedioxytoluenes, 1-Y) by N-bromosuccinimide (NBS) shows that the spin-delocalization effect is also operating at the transition state o f the H-atom abstraction reaction and that the ethylenedioxy group at the benzylic carbon makes the spin-delocalization more observable than do two methyl groups.