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:

(CH3)3CCL

Explanation:

Rate of SN2 reaction depends on steric hindrance around target atom. As CH3I provides less hindrance, it will react faster by SN2 reaction than CH3Br. CH3Cl being primary halide provides less hindrance to action of OH-, thus it will react by SN2 more easily than (CH3)3CCl.

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Answer 2

Answer:

I) CH3Br and

ii) CH3I

because in periodic table the size of atom in down the group increase and the bond also increases

The order of reactivity in SN1 mechanism:

alkyl>1°>2°>3°.