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Solution


Q.

Which among the following halide/s will not show SN1 reaction:                                    [2024]

Choose the most appropriate answer from the options given below:
1 (A), (B) and (D) only  
2 (A) and (B) only  
3 (B) and (C) only  
4 (B) only  

Ans.

(4)

Vinyl carbocation is unstable as it has positive charge on sp hybridized carbon. Hence, its formation is difficult and vinyl halides do not show SN1 reaction.

Vinyl, aryl and halides with halogen at the bridgehead position neither show SN1 nor SN2 reactions.