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Alkenes and Alkynes continued

Alkenes and Alkynes continued. Preparation of alkenes. Preparation of alkenes continued. Dehydration of alcohols. The H and OH are removed from adjacent carbons. E.g. ethanol may be heated with sulphuric acid to create ethene and water.

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Alkenes and Alkynes continued

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  1. Alkenes and Alkynes continued

  2. Preparation of alkenes

  3. Preparation of alkenes continued • Dehydration of alcohols. The H and OH are removed from adjacent carbons. • E.g. ethanol may be heated with sulphuric acid to create ethene and water Sulphuric and phosphoric acid are the acids most commonly used in the dehydration of alcohols to form alkenes.

  4. Branched chain alcohols

  5. Dehydrohalogenation

  6. Addition reactions of alkenes

  7. Addition reactions contd.

  8. Polymerisation.

  9. Other important monomers • PVC is poly vinyl chloride. Vinyl chloride is the common name for chloroethene

  10. Nylon • One of the first polymers synthesised • Made from a di-carboxylic acid and a diamine

  11. Polyacrylamide • Poly 2 propenamide or poly(1-carbamoylethylene) • Repeating units -CH2CHCONH2

  12. Alkynes

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