Summary
This topic covers the formulae, functional groups, and naming conventions for organic compounds, focusing on both aliphatic and aromatic compounds.
- Arenes — aromatic compounds containing a benzene ring.
Example: Benzene is an arene with a delocalized π system. - Halogenoarenes — aromatic compounds with a halogen bonded to a benzene ring.
Example: Chlorobenzene is a halogenoarene. - Phenols — aromatic compounds with a hydroxide group bonded to a benzene ring.
Example: Phenol is a phenol with higher acidity than alcohols. - Acyl Chlorides — acid derivatives with a chlorine atom attached to a carbonyl group.
Example: Ethanoyl chloride is an acyl chloride. - Amines — compounds with an -NH2, -NH, or -N group.
Example: Methylamine is a primary amine. - Amides — consist of an amine group and a carbonyl group.
Example: Acetamide is an amide. - Amino Acids — compounds with an amine group and a carboxyl group.
Example: Glycine is an amino acid.
Exam Tips
Key Definitions to Remember
- Arene
- Halogenoarene
- Phenol
- Acyl Chloride
- Amine
- Amide
- Amino Acid
Common Confusions
- Confusing the stability of benzene with alkenes
- Misidentifying functional groups in complex molecules
Typical Exam Questions
- What is the main characteristic of arenes?
Arenes contain a benzene ring with a delocalized π system. - How do you name a compound with multiple functional groups?
Identify the longest chain, prioritize functional groups, and use prefixes/suffixes accordingly. - What is the difference between a phenol and an alcohol?
Phenols have a hydroxide group bonded to a benzene ring, while alcohols have it bonded to an aliphatic chain.
What Examiners Usually Test
- Ability to identify and name functional groups
- Understanding of the chemical properties of different organic compounds
- Application of systematic naming rules for both aliphatic and aromatic compounds