Organic compounds containing nitrogen — WJEC A-Level Chemistry
In summary: Organic compounds containing nitrogen is a key topic in WJEC A-Level Chemistry. Key exam tip: Ensure you can distinguish between aliphatic and aromatic amine reactions
Exam Tips for Organic compounds containing nitrogen
- Ensure you can distinguish between aliphatic and aromatic amine reactions
- Practice drawing the zwitterionic form of amino acids
- Be prepared to explain the origin of colour in azo dyes using the concept of light absorption
- Memorize the specific reagents and conditions for the coupling reaction of benzenediazonium salts
Common Mistakes
- Confusing the conditions for aliphatic versus aromatic amine synthesis
- Misunderstanding the zwitterionic structure of amino acids at different pH levels
- Incorrectly identifying the chromophore in azo dye coupling reactions
- Failing to correctly apply the mechanism of nucleophilic substitution in amine formation
Marking Points
- Formation of primary aliphatic amines from halogenoalkanes and nitriles
- Formation of aromatic amines from nitrobenzenes
- Basicity of amines
- Ethanoylation of primary amines using ethanoyl chloride
- Reaction of primary amines with cold nitric(III) acid
- Coupling of benzenediazonium salts with phenols and aromatic amines
- Role of the -N=N- chromophore in azo dyes
- Origin of colour in terms of wavelengths of visible light absorbed
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