Introduces reactions involving nitrous acid and the preparation and reactions of diazonium salts, with practice problems for exam preparation.
Aniline (C₆H₅NH₂) is the weakest due to resonance delocalizing the nitrogen lone pair, reducing basicity, as per the PDF.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Reaction with Nitrous Acid and Diazonium Salts - Part 1
Resonance in aniline delocalizes the nitrogen lone pair into the benzene ring, reducing basicity compared to aliphatic amines, as per the PDF.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Reaction with Nitrous Acid and Diazonium Salts - Part 1
In the gaseous phase, basicity increases with more alkyl groups due to electron donation: tertiary > secondary > primary, as per the PDF’s basicity section.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Reaction with Nitrous Acid and Diazonium Salts - Part 1
The lone pair on nitrogen allows amines to accept a proton, making them basic, as per the PDF’s basicity section.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Reaction with Nitrous Acid and Diazonium Salts - Part 1
In the gaseous phase, tertiary amines like (CH₃CH₂)₃N have the highest basicity due to maximum electron donation from three alkyl groups, as per the PDF.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Reaction with Nitrous Acid and Diazonium Salts - Part 1
Aniline (C₆H₅NH₂) is the weakest due to resonance delocalizing the nitrogen lone pair, as per the PDF’s basicity discussion.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Reaction with Nitrous Acid and Diazonium Salts - Part 1
Aniline (C₆H₅NH₂) has the lowest basicity due to resonance delocalizing the nitrogen lone pair, as per the PDF’s basicity section.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Reaction with Nitrous Acid and Diazonium Salts - Part 1
Solubility decreases with increasing alkyl chain length due to reduced hydrogen bonding. CH₃NH₂ (smallest chain) is most soluble, as per the PDF’s physical properties.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Reaction with Nitrous Acid and Diazonium Salts - Part 1
Methylamine (CH₃NH₂, 1C) has two N-H bonds for hydrogen bonding relative to one carbon, giving the highest solubility per carbon, as per the PDF.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Reaction with Nitrous Acid and Diazonium Salts - Part 1
As per the PDF, solubility decreases with increasing alkyl chain length due to the growing hydrophobic nature, reducing hydrogen bonding with water.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Reaction with Nitrous Acid and Diazonium Salts - Part 1
(CH₃)₂NH (secondary) has one N-H bond, while CH₃CH₂NH₂ (primary) has two, leading to less hydrogen bonding and a lower boiling point, as per the PDF.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Reaction with Nitrous Acid and Diazonium Salts - Part 1
For similar molecular weights, primary > secondary > tertiary due to decreasing hydrogen bonding, as per the PDF’s physical properties (e.g., CH₃CH₂NH₂ > (CH₃)₂NH > (CH₃)₃N).
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Reaction with Nitrous Acid and Diazonium Salts - Part 1
