NEET Solved Paper 2018 Question 21
Question: In the reaction. The electrophile involved is [NEET - 2018]
Options:
A) Dichloromethyl anion $ ( \begin{aligned} & \oplus \\ & CHC{l_2} \\ \end{aligned} ) $
B) Formyl cation $ ( \begin{aligned} & \oplus \\ & CHO \\ \end{aligned} ) $
C) Dichloromethyl cation $ ( \begin{aligned} & \oplus \\ & CHC{l_2} \\ \end{aligned} ) $
D) Dichlorocarbene $ \text{(:CC}{l_2}) $
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Answer:
Correct Answer: D
Solution:
- It is Reimer-Tiemann reaction. The electrophile formed is: $ CC{l_2} $ (Dichlorocarbene) according to the following reaction $ CHC{l_3}\text{+O}{H^{-}}\overset{\begin{smallmatrix} \Theta \\ .. \end{smallmatrix}}{\mathop{C}},C{l_3}\text{+}{H_2}O $ $ \overset{\begin{smallmatrix} \Theta \\ .\text{ }\text{.} \end{smallmatrix}}{\mathop{C}},C{l_3}\xrightarrow{{}}\text{:}\underset{Electrophile}{\mathop{CC{l_2}}},\text{+C}{l^{-}} $
