Question

What are the resonance structures of benzoate anion?

I should have 4 resonance structures of benzoate anion, but i only have 2, so far, what are the other 2?

Answer 1

If we consider delocalisation of electron from `pi` bond in conjugation in the benzene ring with the carbonyl group of carboxylate ion,then we get 4 resonance structures as shown above.