The structure of product formed when the given compound reacts with bromine in presence of F e B r 3 has to be determined. Concept Introduction: Electrophilic substitution reaction is a type of reaction in which a particular group or atom in a compound is replaced by electrophile. An electrophile is a species that is deficient of electrons Deactivators are electron withdrawing groups attached to the benzenes that have either positive charge or an atom with high electronegativity. They are meta directors. Benzene is an electron rich aromatic compound and undergoes electrophilic substitution reactions. The position that the electrophile occupies in the ring system depends on various factors like – presence of substituents, activation and deactivation of the ring etc. The pi electrons of the aromatic system must be available freely for the reaction to occur. Further, the aromatic ring must not have many bulk substituents on it to ease the any type of electrophilic substitution reaction. Presence of many bulk substituents hinders the ability of the delocalizing pi electrons to bond with the electrophile Activators are electron donating groups attached to the benzenes that have either electron density that is able to push into benzene ring or a lone pair of electrons. They are ortho–para directing. Bromination: In bromination reaction, hydrogen atom of a molecule is replaced by a bromine atom.

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Chapter 18, Problem 70PP

Interpretation Introduction

Interpretation: The structure of product formed when the given compound reacts with bromine in presence of FeBr3 has to be determined.

Concept Introduction:

Electrophilic substitution reaction is a type of reaction in which a particular group or atom in a compound is replaced by electrophile. An electrophile is a species that is deficient of electrons

Deactivators are electron withdrawing groups attached to the benzenes that have either positive charge or an atom with high electronegativity. They are meta directors.

Benzene is an electron rich aromatic compound and undergoes electrophilic substitution reactions.

The position that the electrophile occupies in the ring system depends on various factors like – presence of substituents, activation and deactivation of the ring etc.

The pi electrons of the aromatic system must be available freely for the reaction to occur. Further, the aromatic ring must not have many bulk substituents on it to ease the any type of electrophilic substitution reaction. Presence of many bulk substituents hinders the ability of the delocalizing pi electrons to bond with the electrophile

Activators are electron donating groups attached to the benzenes that have either electron density that is able to push into benzene ring or a lone pair of electrons. They are ortho–para directing.

Bromination: In bromination reaction, hydrogen atom of a molecule is replaced by a bromine atom.

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