Introducing Benzene (OCR A-Level Chemistry A): Flashcards

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Introducing benzene
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Molecular formula of benzene

C6H6\text{C}_6\text{H}_6

Discoverer of benzene (1825)

Michael Faraday

Health classification of benzene

Carcinogen

Kekulé's benzene structure (1865)

Alternating single & double bonds in ring

Benzene's reaction with bromine

Does not decolourise it

C-C bond length in benzene (nm)

0.139

Benzene stability vs Kekulé structure

152 kJ mol⁻¹ more stable

Electron arrangement in delocalised model

6 electrons delocalised in π-bonds across all C atoms

Prefix for benzene as substituent

Phenyl

Name: benzene with amino group

Phenylamine

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