Bonding (A-level only) (3.3.10.1) | AQA A-level Chemistry - (7405) | KnowledgeSet

Bonding (A-level only)

Chemistry · A-Level · AQA · AQA A-level Chemistry - (7405) · Specification point · 3.3.10.1 · Organic chemistry · Aromatic chemistry (A-level only)

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3.3.10.1 Bonding (A-level only)

Content	Opportunities for skills development
$The nature of the bonding in a benzene ring, limited to planar structure and bond length intermediate between single and double. Delocalisation of p electrons makes benzene more stable than the theoretical molecule cyclohexa-1,3,5-triene. Students should be able to: use thermochemical evidence from enthalpies of hydrogenation to account for this extra stability explain why substitution reactions occur in preference to addition reactions.$

Content

Opportunities for skills development

The nature of the bonding in a benzene ring, limited to planar structure and bond length intermediate between single and double. Delocalisation of p electrons makes benzene more stable than the theoretical molecule cyclohexa-1,3,5-triene. Students should be able to: use thermochemical evidence from enthalpies of hydrogenation to account for this extra stability explain why substitution reactions occur in preference to addition reactions.