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Optical isomerism (A-level only)
This A-level-only topic introduces stereochemistry beyond structural isomerism.
4
Objectives
10
Flashcards
10
Questions
88 min
Study time
AqaA LevelChemistryOrganic chemistry
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4 objective pages available
Optical isomerism (A-level only)4 objectives
- Identify chiral carbon atoms in organic molecules.
- Draw or recognise pairs of optical isomers.
- Explain why optical isomers rotate plane-polarised light in opposite directions.
- Distinguish optical isomerism from structural isomerism.
Key terms
ChiralityEnantiomer
Exam tips
- Draw structures clearly: When identifying chiral centers, draw the molecular structure clearly to visualize the substituents.
- Practice drawing isomers: Regularly practice drawing the structures of optical isomers to become familiar with their configurations.
Common mistakes
- Misidentifying chiral centers: Always check the substituents attached to the carbon atom; if any two groups are the same, it is not chiral.
- Confusing optical isomers with structural isomers: Remember that optical isomers are specifically non-superimposable mirror images, while structural isomers differ in the connectivity of atoms.
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