Unit 1 Introduction to Dyes

8 lecture hours

• Definition of Dye or Dyestuff
• Requisites of a True Dye, Historical development from natural to synthetic dyes
• Important dyestuff intermediates
• Nomenclature of dyes intermediates & dyes Introduction to Textile Fibres: Fibres & its types such as cotton
• cellulose acetate

Unit 2 Chemistry of benzenoid aromatics

8 lecture hours

• Electrophilic aromatic substitution reactions with the mechanisms
• one carbon electrophiles & their utility
• Nucleophilic aromatic substitution reaction Orientations in aromatic substitution reaction
• Hammet substitution constants
• Introduction of various functional groups into benzenoid aromatics
• functional group inter conversions
• Synthesis of typical dyestuff intermediates based on benzene

Unit 3 Classification of Dyes

8 lecture hours

• Classification of Dyes based on application Introduction
• Direct dyes
• Acid dyes
• Basic dyes
• Developed dyes
• Mordant dyes
• Vat dyes
• Sulpher dyes
• Disperse dyes
• Reactive dyes Classification of Dyes based on Chemical Structure: Nitroso dyes
• Nitro dyes
• Azo dyes
• Diphenylmethane dyes
• Triphenylmethane dyes
• Xanthene dyes
• Heterocyclic Dyes etc

Unit 4 Chemistry of Naphthalene- Electrophilic aromatic substitution reactions

• Bucherer reaction
• Reverse Bucherer reaction
• Synthesis of naphthols
• 8 Subject Code: 3133604 w.e.f