Nitration of Benzene Concepts

This video tutorial explains the mechanism of the nitration of benzene, an electrophilic aromatic substitution reaction. It begins with an overview of the reaction, where benzene reacts with nitric and sulfuric acids to form nitrobenzene. The video details the generation of the nitronium ion, the electrophile, and its reaction with benzene. It concludes with the regeneration of the aromatic ring using a base, resulting in the formation of nitrobenzene.

What type of reaction is the nitration of benzene?

• Addition reaction

• Free radical substitution

• Nucleophilic substitution

• Electrophilic aromatic substitution

Which two acids are used to generate the electrophile in the nitration of benzene?

• Sulfuric acid and acetic acid

• Nitric acid and sulfuric acid

• Nitric acid and hydrochloric acid

• Hydrochloric acid and sulfuric acid

What is the role of sulfuric acid in the generation of the electrophile?

• It acts as a solvent

• It acts as a catalyst

• It provides a proton to make a better leaving group

• It reacts with benzene

What is the electrophile generated in the nitration of benzene?

• Nitrate ion (NO3-)

• Sulfate ion (SO4-)

• Hydronium ion (H3O+)

• Nitronium ion (NO2+)

During the reaction mechanism, what happens to one of the pi bonds in benzene?

• It forms a new double bond

• It breaks to form a carbocation

• It forms a triple bond

• It remains unchanged

What is the intermediate formed when benzene reacts with the nitronium ion?

• A radical

• A carbocation

• A neutral molecule

• A carbanion

What is used to regenerate the aromatic ring in the nitration of benzene?

• An acid

• A base

• A radical

• A nucleophile

Which of the following can act as a base in the final step of the nitration mechanism?

• Nitric acid

• Water

• Benzene

• Sulfuric acid

What is the final product of the nitration of benzene?

• Phenol

• Nitrobenzene

• Benzene

• Aniline

What is the net effect of the nitration of benzene?

• Replacement of a hydrogen atom with an electrophile

• Replacement of a hydrogen atom with a nucleophile

• Addition of a hydrogen atom

• Removal of a hydrogen atom