Alcohols and Ethers - Result Question 8
####11. The major product formed in the following reaction is
(2018 Main) (a)
(c)
(b)
(d)
Show Answer
Answer:
Correct Answer: 11. (d)
Solution:
- Key idea The reaction given is a nucleophilic substitution reaction in which cleavage at $C-O$ bond is visible. The product formation can be visualised with the help of following analysis.
If any one properly visualise the fact written with figure above, than a conclusion can be made that $C-O$ bonds marked (a) and (b) in the figure will undergo heterolysis during the reaction.
The reaction can be represented as
Mechanism
Step I The reaction begins with the attack of $H^{+}$of $HI$ on oxygen to form oxonium ion as
Step II This oxonium ion undergoes lysis and addition of $I^{-}$to form two products as
Step III Similar pathway is followed at the other oxygen atom, which can be visualised as
Note Mechanism of a reaction is always a logical sequencing of events which may occur simultaneously as well.
