Published by:
CGP EDU Academic Team
Published on: August 14, 2026
For the reaction of ethyl tert-butyl ether 
with excess HI on heating, which mechanistic description is correct?
A
Both 
bonds cleave by 
; products are 
and 
.
bonds cleave by ; products are and . B
Tert-butyl side undergoes 
to give 
, ethyl side is converted via protonated ethanol to 
.
to give , ethyl side is converted via protonated ethanol to . C
Ethyl side undergoes 
and forms 
; tert-butyl side stays as alcohol.
and forms ; tert-butyl side stays as alcohol. D
Only one 
bond cleaves; the ether is recovered unchanged.
bond cleaves; the ether is recovered unchanged.
Text Solution
Verified by ExpertsThe correct answer is:
B
Ether is protonated; cleavage occurs at the tert-butyl side via 
tert-butyl iodide; the ethyl fragment (ethanol) is converted by excess 
ethyl iodide.
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