The formation of 2 , 4 , 4 , 6 -tetrabromocyclohexadienone from phenol in presence of an excess of bromine solution is to be explained. Concept introduction: The replacement or substitution of one functional group with another functional group in any chemical reaction is termed as a substitution reaction. The electron deficient chemical species that contains positive charge or have a deficiency of electrons are known as an electrophile. In an electrophilic aromatic substitution reaction, electrophile takes the position of a hydrogen atom or the leaving group by attacking the electron rich carbon atom of benzene. In electrophilic aromatic substitution, if the ring bears several substituents, then the orientation is controlled by the most activating substituent.

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Chapter 23, Problem 31P

Interpretation Introduction

Interpretation:

The formation of 2,4,4,6-tetrabromocyclohexadienone from phenol in presence of an excess of bromine solution is to be explained.

Concept introduction:

The replacement or substitution of one functional group with another functional group in any chemical reaction is termed as a substitution reaction.

The electron deficient chemical species that contains positive charge or have a deficiency of electrons are known as an electrophile.

In an electrophilic aromatic substitution reaction, electrophile takes the position of a hydrogen atom or the leaving group by attacking the electron rich carbon atom of benzene.

In electrophilic aromatic substitution, if the ring bears several substituents, then the orientation is controlled by the most activating substituent.

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