Chapter 13: Organic Compounds Containing Nitrogen

13.1.1 Definition

Amines are organic compounds derived from ammonia, differing in the number of groups attached to nitrogen.

13.1.2 Types of Amines

Amines are organic compounds derived from ammonia that are classified into primary, secondary, and tertiary types based on the number of alkyl or aryl groups attached to the nitrogen atom.

13.1.3 Structure

The structure of amines reveals their sp³ hybridization, contributing to their trigonal pyramidal shape and basicity due to the presence of a lone pair on nitrogen.

13.2.1 Common System

The Common System of nomenclature for amines categorizes them based on their structure, focusing on alkylamines and arylamines.

13.2.2 IUPAC System

The IUPAC naming system for amines establishes a systematic method for naming these compounds based on their structure.

13.3.1 Reduction of Nitro Compounds

This section focuses on the reduction of nitro compounds to form amines, detailing the reaction process and key reagents used.

13.3.2 Ammonolysis of Alkyl Halides

Ammonolysis of alkyl halides involves the substitution reaction where ammonia reacts with alkyl halides to form amines.

13.3.3 Reduction of Nitriles and Amides

This section describes the methods for reducing nitriles and amides to amines, highlighting the chemical reactions and catalysts used.

13.3.4 Gabriel Phthalimide Synthesis (for primary amines)

The Gabriel Phthalimide synthesis is a crucial method for producing primary amines through the reaction of potassium phthalimide with alkyl halides, followed by hydrolysis.

13.5.1 Basic Nature

Amines are classified as weak bases due to their basic nature, reacting with acids to form salts.

13.5.2 Acylation

Acylation is a chemical reaction involving amines and acyl chlorides or acid anhydrides, resulting in the formation of amides.

13.5.3 Alkylation

Alkylation is a chemical reaction in which an amine reacts with an alkyl halide, forming a substituted amine and releasing a hydrogen halide.

13.5.4 Carbylamine Reaction (test for primary amines)

The Carbylamine reaction is a chemical test specifically used to detect primary amines by producing foul-smelling isocyanides.

13.5.5 Diazotisation (for aromatic primary amines)

Diazotisation is the process by which aromatic primary amines react with nitrous acid to form diazonium salts, which are important intermediates in organic synthesis.

13.5.6 Coupling Reaction

The coupling reaction involves benzene diazonium salts reacting with phenols or anilines to form azo dyes.

13.6.1 Structure

13.6.2 Preparation

The preparation of amines involves several chemical reactions and methods.

13.6.3 Reactions

This section discusses the reactions of cyanides and isocyanides, including their preparation and key transformations they undergo.