Aryl Diazonium Salts and Reactions

The video tutorial covers Aryan diazonium salts, their synthesis, and various reactions they undergo, including Sandmeyer reactions and diazo coupling. It explains how to synthesize Aryan diazonium salts from benzene, discusses the stability of nitrogen gas as a leaving group, and explores different reactions to replace the N2 group with halogens or other groups. The tutorial also includes synthesis problems and mechanisms for diazo coupling reactions, emphasizing the role of nucleophiles and electrophiles.

What is the first step in synthesizing an aryl diazonium salt from benzene?

• Reaction with sodium nitrite

• Reduction with metal

• Coupling with phenol

• Aromatic nitration

In the Sandmeyer reaction, what is the leaving group when aryl diazonium salt reacts with copper(I) chloride?

• Oxygen gas

• Hydrogen gas

• Nitrogen gas

• Chlorine gas

Which reagent is used to convert an aryl diazonium salt into fluorobenzene?

• H3PO2

• HBF4

• Copper(I) chloride

• Copper(I) bromide

What is the final product when nitrobenzene is converted back to benzene using aryl diazonium salt?

• Fluorobenzene

• Aniline

• Phenol

• Benzene

Which group directs bromine atoms to the ortho and para positions during the synthesis of 1,3,5-tribromobenzene?

• NH2 group

• NO2 group

• CN group

• OH group

What is the role of phenol in diazo coupling reactions?

• Electrophile

• Nucleophile

• Catalyst

• Leaving group

In diazo coupling, what type of linkage is formed between the two molecules?

• Ether linkage

• Ester linkage

• Amide linkage

• Azo linkage

Which isomer of the azo compound is more stable due to less steric strain?

• Trans isomer

• Cis isomer

• Neither is stable

• Both are equally stable

What is the effect of a strong activating group on the nucleophilicity of the phenol ring in diazo coupling?

• No effect

• Increases nucleophilicity

• Converts it to an electrophile

• Decreases nucleophilicity

What is the side product formed when an aryl diazonium salt reacts with phenol in diazo coupling?

• HCl

• NH3

• CO2

• H2O