Question

For the given pair of ${SN}_2$ reactions, the first compound will undergo intramolecular substitution _______ than the second compound

• A. faster
• B. slower
• C. intramolecular substitution will not happen
• D. cannot be determined

Answer 1

Answer: (A)

faster

On intramolecular substitution reaction, the first compound will form 6 member ring whereas the second compound will form 8 member ring.
6 member ring is more stable than the 8 member ring. Hence, the first compound will go intramolecular substitution faster than the second compound.