Question

An unknown alcohol is treated with “Lucas reagent” to determine whether the alcohol is primary secondary or tertiary. Which alcohol reacts fastest and by what mechanism?

• A. Tertiary alcohol by $S_{N}2$
• B. Secondary alcohol by $S_{N}1$
• C. Tertiary alcohol by $S_{N}1$
• D. Secondary alcohol by $S_{N}2$

Answer 1

Answer: (C)

Tertiary alcohol by $S_{N}1$

Answer 2

In Lucas test, turbidity appears immediately with tertiary alcohol by $S_{N}1$ mechanism