Welcome to ChemZipper !!!: Alkenes undergo electrophilic addition reaction and benzene undergoes electrophilic substitution whereas both proceeds through carbocation intermediate. Explain.

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Alkenes undergo electrophilic addition reaction and benzene undergoes electrophilic substitution whereas both proceeds through carbocation intermediate. Explain.

Electrons are available in case of alkanes whereas they are delocalized in case 
of benzene. After attack of electrophile a stable delocalized carboncation is 
formed on benzene ring. Whereas a carbocation which can rearrange is formed 
by addition of electrophile on alkane.

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