# How does chlorine substitution on a phenyl ring modify the reactivity of the ring?

##### 1 Answer
Apr 1, 2016

Because the electronegative chlorine atom withdraws electron density from the ring, making the ring less nucleophilic.

#### Explanation:

So, by induction, the chloro-substituted phenyl ring is a less powerful nucleophile, and thus, less likely to undergo substitution by electrophiles. Because of the lone pairs on the chloride, it is an $\text{ortho}$ and $\text{para}$ director in those reactions where it does undergo substitution.