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Deactivating Group

Last updated

Feb 28, 2022
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- Cycloreversion
- Decarboxylation

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If electrophilic aromatic substitution of a monosubstituted benzene is slower than that of benzene under identical conditions, the substituent in the monosubstituted benzene is called a deactivating group.

eg:

Under identical conditions, Reaction 2 is slower than Reaction 1. Thus, the nitro group is a deactivating group.

All deactivating groups are electron-withdrawing groups.

Common deactivating groups:

see also activating group, ortho, para directing group, meta directing group

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