Which of the following compounds will undergo SN1 reaction? (a) (b) (c) (d)

The compound a is a tertiary alkyl halide and there is formation of the carbocation intermediate formed by the loss of the chlorine ion which stabilized by the resonance with the benzene ring. Hence, the correct answer is option (a) CH2 Br CH Br CH NO2 Br CH2 Br ALKYL AND ARYL HALIDES 28