Chemistry A-Level
Low polarity of σ-bonds
What Low polarity of σ-bonds means in Chemistry A-Level, as defined for OCR.
Definition of Low polarity of σ-bonds
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Reference: OCR
The σ-bond electrons are shared fairly evenly, so there is no significant δ⁺ or δ⁻ centre for polar reagents or nucleophiles to attack.
Topics that use Low polarity of σ-bonds
- Alkanes (OCR A-Level)
Related terms
- Bond angle of about 109.5°
- Consequences for alkane reactivity
- Distinguishing σ-bonds from π-bonds
- Effect of branching on boiling point
- Effect of carbon-chain length on boiling point
- Electron pair repulsion between bonding pairs
- Free rotation about σ-bonds
- Further substitution giving polyhalogenated products
Using Low polarity of σ-bonds in the exam
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