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Description
Flashcards by Fauzia Ali, updated more than 1 year ago
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Created by Fauzia Ali
over 9 years ago
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| Question | Answer |
| Why is benzene less reactive than alkenes? | |
| In cyclohexene the pi bond is made by sideways overlap of p orbitals on adjacent carbon atoms. Whereas for benzene, the pi bond is made by the sideways overlap of p orbitals on all 6 carbons atoms adjacent to each other | Therefore on benzene the 6 pi electrons are delocalised over 6 carbon atoms On cyclohexane the two pi electrons are localised between the two carbon atoms |
| Therefore cyclohexene has a higher pi electron density than benzene and will attract electrophiles more strongly as it induces a bigger dipole | So alkenes are more reactive than benzene |
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