CBSE Class 12 Chemistry 2014 Delhi Set 1 Solved Paper

Question : 26 of 30

Marks: +1, -0

(a) Write the mechanism of the following reaction:

{\CH}_3 {\CH}_2 {\OH} {{───▸}}↖{ {\HBr}} {\CH}_3 {\CH}_2 {\Br}+ {\H}_2 {\O}

(b) Write the equation involved in Reimer-Tiemann reaction.

Solution:

{\CH}_3 {\CH}_2 {\OH} {{───▸}}↖{ {\HBr}} {\CH}_3 {\CH}_2 {\Br}+ {\H}_2 {\O}

The reaction follows

\ {SN}^2

mechanism. It is a single step mechanism which proceeds via the formation of transition state.
MECHANSIM:

The nucleophile attacks the electrophilic carbon on the backside, resulting in the inversion of configuration.
(b) The equation involved in the Reimer-Tieman reaction.

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