Which of the following shows the Lucas test i | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) The Lucas test involves the reaction of an alcohol with Lucas reagent $(conc. \ HCl + ZnCl_2)$.It proceeds via an $S_N1$ mechanism,where the rate-

Vedclass · Accepted Answer

$Ph-C(Ph)_2-OH$

Vedclass · Answer

(D) The Lucas test involves the reaction of an alcohol with Lucas reagent $(conc. \ HCl + ZnCl_2)$.It proceeds via an $S_N1$ mechanism,where the rate-determining step is the formation of a carbocation.Alcohols that form highly stable carbocations react instantaneously with the Lucas reagent.Option $D$ is $Ph-C(Ph)_2-OH$,which is a tertiary alcohol. Upon protonation and loss of water,it forms a triphenylmethyl carbocation $(Ph_3C^+)$.This carbocation is exceptionally stable due to extensive resonance stabilization by three phenyl rings.Therefore,it reacts instantaneously with the Lucas reagent.

Which of the following shows the Lucas test instantaneously?

Similar Questions

The major product $(P)$ of the given reaction is .... (where,$Me$ is $-CH_3$)

Ethanol,when reacted with $PCl_5$,gives $A$,$POCl_3$,and $HCl$. $A$ reacts with silver nitrite $(AgNO_2)$ to form $B$ (major product) and $AgCl$. $A$ and $B$ are respectively:

The Lucas test is used to distinguish between which of the following?

Describe the production,physical properties,physiological effects,and uses of methanol.

Identify the product formed when $(R)-2-$butanol and $(S)-2-$butanol react with $(R,R)-$tartaric acid in an acidic medium.

Vedclass Test Series

Exam Paper Generator

Online Exam Module