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Alkenes and electrophilic addition

Core organic chemistry · Lesson 3 of 6

Lesson 3 of 6

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Lesson 3 of 6 · Core organic chemistry

Alkenes and electrophilic addition

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By the end you’ll be able to

Describe alkenes as unsaturated hydrocarbons containing a $\mathrm{C=C}$ double bond and explain why this bond is the site of reaction.
Recognise and draw $E/Z$ or cis-trans isomerism where restricted rotation about the $\mathrm{C=C}$ bond and suitable substituents allow it.
Write equations for the reactions of alkenes with hydrogen, halogens, hydrogen halides and steam.

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Apply the mechanism of electrophilic addition to reactions of alkenes with bromine and hydrogen bromide, using correct curly-arrow notation and identifying the electrophile.

Predict major products of alkene addition reactions, including asymmetric addition to unsymmetrical alkenes where carbocation stability is relevant at this level.

Describe oxidation of alkenes by suitable oxidising agents, where required by the specification, and deduce products from cleavage or dihydroxylation outcomes.

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