Why do only unsaturated hydrocarbons undergo addition reactions? For example, ethene or ethyne will undergo an addition reaction with chlorine, whereas ethane will not.

Furthermore, why does benzene not undergo addition reactions, even though it is not saturated?


To what would you add given a saturated hydrocarbon? You must substitute, abstract, or displace.

Benzene is aromatic — different pattern of reactivity. It photochlorinates. It UV reacts with maleic anhydride, then adds another mole thermally. Palladium catalysis will swap appropriate substituents.

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.