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More stable carbocation???tertiary, tertiary or benzylic?

This is a very confusing qtnquestion that which is more stable? Benzylic, benzylic or tertiary butyl carbocation? Some sources say benzylic due to resonance some say tertiary due to +i effect and 9 hyperconjugative structures. I also found that benzylic has almost 3kcal 3 kcal/mol more energy than the other making it less stable.But But some very good examinations has approved benzylic. So finally whats the concrete answer?????

More stable carbocation???tertiary or benzylic?

This is a very confusing qtn that which is more stable? Benzylic or tertiary butyl carbocation Some sources say benzylic due to resonance some say tertiary due to +i effect and 9 hyperconjugative structures. I also found that benzylic has almost 3kcal /mol more energy than the other making it less stable.But some very good examinations has approved benzylic. So finally whats the concrete answer?????

More stable carbocation, tertiary or benzylic?

This is a very confusing question that which is more stable, benzylic or tertiary butyl carbocation? Some sources say benzylic due to resonance some say tertiary due to +i effect and 9 hyperconjugative structures. I also found that benzylic has almost 3 kcal/mol more energy than the other making it less stable. But some very good examinations has approved benzylic. So finally whats the concrete answer?

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source | link

More stable carbocation???tertiary or benzylic?

This is a very confusing qtn that which is more stable? Benzylic or tertiary butyl carbocation Some sources say benzylic due to resonance some say tertiary due to +i effect and 9 hyperconjugative structures. I also found that benzylic has almost 3kcal /mol more energy than the other making it less stable.But some very good examinations has approved benzylic. So finally whats the concrete answer?????