The ortho/para product ratio is expected to be the smallest for the bromination of which of these?
A)Toluene
B)Isopropylbenzene
C)Butylbenzene
D)sec-Butylbenzene
E)tert-Butylbenzene

Question

Quizplus · Accepted Answer

The ortho/para product ratio is expected to be the smallest for the bromination of tert-Butylbenzene. This is because the bulky tert-butyl group hinders the approach of the bromine to the ortho positions more than the other substituents, making the para position relatively more accessible and thus favored.

The Ortho/para Product Ratio Is Expected to Be the Smallest