Edexcel IAL Chemistry AS 5.1 Alkenes and carbon–carbon double bonds
Edexcel IAL Chemistry AS 5.1 Alkenes and carbon–carbon double bonds
Count sigma bonds along each internuclear axis and pi bonds above and below the plane, then use ring and double-bond unsaturation to verify the molecular formula.
How this is tested
- Count sigma and pi bonds from displayed or skeletal alkene structures.
- Compare head-on sigma overlap with sideways pi overlap above and below the bond axis.
- Apply alkene and cycloalkene general formulae to molecular and empirical formulae.