# What undergoes sn1 reactions?

Jun 14, 2018

Tertiary halogenoalkanes.

#### Explanation:

• Here, the first slow step involves only the heterolytic fission of the C-X bond (where X is the halogen).

• As a result of this fission, you get a tertiary carbocation and ${X}^{-}$.

• It then follows that the nucleophile (like $O {H}^{-}$ or $C {N}^{-}$), attacks the carbocation quickly.

This produces the products.

An example involves the reaction of 2-bromo methylpropane with NaOH in water. You get as a result methyl proapan-2-ol and NaBr.

In ${S}_{N} 1$ reactions, the rate of the reaction will only depend on the concentration of the halogenoalkane.