Question

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

Answer 1

Answer:

(i)CH3I

(ii)CH3Cl

Explanation:

(i) because iodine has big sixe so it will be replaced easilly .

(ii) CH3Cl has prinary carbon where as the other compound has tertiary carbon so primary reacts faster ..

Answer 2

Hey Dear,

◆ Answer -

(i) CH3I

(ii) CH3Cl

● Explaination -

Rate of SN2 reaction depends on steric hindrance around target atom.

(i) CH3Br or CH3I -

As CH3I provides less hindrance, it will react faster by SN2 reaction than CH3Br.

Order of reactivity of alkyl halides are given by -

R-I > R-Br > R-Cl > R-F

(ii) (CH3)3CCl or CH3Cl -

CH3Cl being primary halide provides less hindrance to action of OH-, thus it will react by SN2 more easily than (CH3)3CCl.

Order of reactivity of alkyl halides are given by -

1° halide > 2° halide > 3° halide

Hope this helps you...