Edexcel IAL Chemistry AS 10.5 Bond polarity and mechanism choice
Edexcel IAL Chemistry AS 10.5 Bond polarity and mechanism choice
Add the correct δ+ and δ− labels from electronegativity, then start the nucleophile's curly arrow toward the δ+ atom and justify why an unpolarised bond resists attack.
How this is tested
- Add the relevant dipole to C–O or C=O before selecting a nucleophilic mechanism.
- Explain hydride attack on polar C=O through attraction to δ+ carbon, unlike non-polar C=C.
- Link the polar C–halogen or C–O bond to nucleophilic substitution at carbon.