Which of the following pairs of substances undergoes S_(N^(2)) substit – InterviewSolution

1.	Which of the following pairs of substances undergoes S_(N^(2)) substitution reaction faster and why?
Answer» Solution :(i). being a primary alkyl halide will react faster as COMPARED to the other substance which is a tertiary alkyl halide. This is on account of LESSER steric hindrance involved in the first substance when nucleophile attacks. (ii). will react faster as compared to the other substnace since the clevage of `C-I` bond is easier as compared to that of `C -Cl` bond due to less bond DISSOCIATION enthalpy.

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