BRAINCAKEPredicting Properties from Functional Groups
Once you have identified the functional groups in a molecule, you can predict how it behaves. Each group reacts in much the same way whatever else is in the molecule, so a molecule with several groups shows the reactions of all of them.
Physical properties
• -OH groups can form hydrogen bonds, which raise boiling points and make small molecules soluble in water.
• Hydrocarbon chains are non-polar, so the longer the chain, the less soluble the molecule is in water.
Chemical reactions
• C=C: decolourises bromine water (electrophilic addition); also adds H2, HBr and steam.
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More in Organic Synthesis
- Heating under Reflux
- Distillation
- Using a Separating Funnel
- Drying an Organic Liquid
- Redistillation and Purification
- Identifying Functional Groups
- Two-Stage Synthetic Routes
All 8 lessons in Organic Synthesis · All OCR AS-level Chemistry topics