Unit 3 · Structure 3: Classification of matter · Topic 3.2

IB Chemistry HL — Functional groups: classification of organic compounds

Topic 3.2 of IB Chemistry covers Functional groups: classification of organic compounds, which is part of Unit 3: Structure 3: Classification of matter. Students explore key concepts including Organic compounds and homologous series, Representing organic molecules, Functional groups and nomenclature, and more. A strong understanding of functional groups: classification of organic compounds is essential for IB Chemistry HL exams and builds the foundation for connected topics across the syllabus.

Higher Level students should use this topic hub as a map: start with the shared sub-topics, then follow the HL-only extensions and exam-skill links where this topic asks for deeper analysis.

Exam technique guide Practice questions

What you'll learn in Topic 3.2

3.2.1 Organic compounds and homologous series
3.2.2 Representing organic molecules
3.2.3 Functional groups and nomenclature
3.2.4 Spectroscopic identification of organic compounds
3.2.5 Isomerism: structural and stereoisomers (HL)
3.2.6 Benzene and extended organic reactions (HL)

Suggested study order: Read the notes for each sub-topic below → test yourself with flashcards → attempt practice questions → review exam technique.

Study resources — 3.2 Functional groups: classification of organic compounds

3.2.1

Organic compounds and homologous series

Notes

3.2.2

Representing organic molecules

Notes

3.2.3

Functional groups and nomenclature

Notes

3.2.4

Spectroscopic identification of organic compounds

Notes

3.2.5

Isomerism: structural and stereoisomers (HL)

Notes

3.2.6

Benzene and extended organic reactions (HL)

Notes

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Topic 3.2 Functional groups: classification of organic compounds forms a core part of Unit 3: Structure 3: Classification of matter in IB Chemistry HL. Mastering these concepts will strengthen your understanding of connected topics across the syllabus and prepare you for exam questions that require analysis, evaluation, and real-world application.

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IB Chemistry HL — Functional groups: classification of organic compounds

Higher Level students should use this topic hub as a map: start with the shared sub-topics, then follow the HL-only extensions and exam-skill links where this topic asks for deeper analysis.