Which compound in each of the following pairs will react faster in SN2

1.	Which compound in each of the following pairs will react faster in SN2 reaction with–OH? Why?(i) CH3Br or CH3I(ii) (CH3)3CCl or CH3Cl
Answer» (i) CH₃–I reacts faster than CH₃–Br as iodine is a better leaving group because of its larger size. (ii) CH₃–Cl (1° halide) reacts faster than (CH₃)₃CCl (3° halide) since in case tertiary butyl chloride three bulky methyl group hinder the approaching nucleophile.

Which compound in each of the following pairs will react faster in SN2 reaction with–OH? Why?(i) CH3Br or CH3I(ii) (CH3)3CCl or CH3Cl

Answer»

(i) CH₃–I reacts faster than CH₃–Br as iodine is a better leaving group because of its larger size.

(ii) CH₃–Cl (1° halide) reacts faster than (CH₃)₃CCl (3° halide) since in case tertiary butyl chloride three bulky methyl group hinder the approaching nucleophile.

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Which compound in each of the following pairs will react faster in SN2 reaction with–OH? Why?(i) CH3Br or CH3I(ii) (CH3)3CCl or CH3Cl

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