Question

Which of the folliwng is the order of the rate of reaction of `C_(6)H_(6),C_(6)D_(6)`, and `C_(6)T_(6)` towards sulphonation?
A. Same rates of reactions of `C_(6)D_(6), C_(6)D_(6)` and `C_(6)T_(6)`.
B. `C_(6)T_(6) gt C_(6) D_(6) gt C_(6) H_(6)`
C. `C_(6) H_(6) gt C_(6) D_(6) gt C_(6) T_(6)`
D. `C_(6) H_(6) gt C_(6) D_(6) = C_(6) T_(6)`

Answer 1

Correct Answer - `c`
Sulphonation is a reversable process and shows `1^(@)` kinetic isotope effect, wheras other `SE` reactiosn (i.e. nitration halogation, etc.) do not show `1^(@)` kinetic isotope effect.