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The electrophile involved in the followi...

The electrophile involved in the following reaciton is

A

formyl cation `(overset(+)(C)HO)`

B

Dichlorocarbene `( :C Cl_(2))`

C

Dichloromethul cation `(overset(+)(C)HCl_(2))`

D

Trichloromethyl cation `( :overset(-)(C)Cl_(3))`

Text Solution

Verified by Experts

The correct Answer is:
B
The Reimer-Tiemann reaction involves electrophilic substitution on the highly reactive phenoxide ring. The electrophilic reagent is dichlorocarbene `( :C Cl_(2))` generated from chloroform by the aciton of base:
`CHCI_(3) +OH^(-)overset(rarr)underset(larr). :barC CI_(3) +H_(2)O`
`: C CI_(3)^(-)overset(rarr)underset(larr). CI^(-) + : C CI_(2)`
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