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Unformatted text preview: 6-67 (c) continued The only mechanism of tHeSe twO involving C- bond cleavage is the E L , bUt tH C cleavage doeS NT Occur in the slow, ratedeteRIning sep. Knetic isotope effectS are obseveD ony when CH (c- bond cleaVage OccUrs in the ratedeteRining sep huS, we would expect to observe no change in rtE For the deuerumsubstituted molecUes in the E or mechanismS (n fact, his tecHnique of mAuinG Soope eecS s one OF he mOS useful oolS chemsS haVe For deermni what mechaniSm a reacion folLows. ) 668 Both producs are formed throUgh E2 reacionS. The diference is Whether a or an h is remoVed by the baSe s explained in Problem 667, C ceavage can be up to 7 times slower than C cleaVage So the product from C cleavage Should be fOrmed abou times as fast. THis rate preferee S reeced in he 7 : 1 produc MIxure ("Ph iS the abbreVaion For a benzene ring)...
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This note was uploaded on 02/27/2010 for the course CHEM 140 taught by Professor Wade during the Spring '10 term at Whitman.
- Spring '10