vQuestion 17

Benzene rings with substituents having the atom directly attached to the benzene ring involved in a π bond to a more electronegative atom react in electrophilic substitution reactions more slowly than benzene itself.

As seen below, it is common when drawing substituted benzenes to not show all of the double bonds.
Which of the substituents below has only σ (single) bonds?



ORGRX Aromatics

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