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Organic Chemistry

Part2 : Alkenes. Organic Chemistry. Alkenes One double bond Unsaturated hydrocarbons (carbons are NOT holding the maximum number of hydrogen atoms they can hold). 1. Common name. -ylene. C 8 H 16. C 4 H 8. The Vinyl group. The Allyl group. Alkyl group. ……………. …………………. Alkenes.

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Organic Chemistry

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  1. Part2 : Alkenes Organic Chemistry

  2. Alkenes • One double bond • Unsaturated hydrocarbons (carbons are NOT holding the maximum number of hydrogen atoms they can hold)

  3. 1. Common name -ylene C8H16 C4H8

  4. The Vinyl group The Allyl group Alkyl group

  5. …………….. ………………….

  6. Alkenes 2. IUPAC name CnH2n • Ethene C2H4 • Propene C3H6 • Butene C4H8 • Pentene C5H10 • Hexene C6H12 • Heptene C7H14 • Octene C8H16 • Nonene C9H18 • Decene C10H20 …..ene

  7. IUPAC name

  8. IUPAC name

  9. Draw the structure and give the molecular formula for each of the following compounds. 1. Cis 3-Heptene 2. Cis Cyclohexene 3. trans-Cyclohexene

  10. Physical Properties of Alkenes

  11. Cycloalkenes CnH2n-2 (n=3,4,5,…)

  12. Isomer C4H8

  13. Isomer C4H8

  14. Isomer C5H10

  15. C5H10 + O2 C8H16 + O2 Reactions of Alkenes 1.Combustion reaction

  16. 2. Addition Reactions A characteristic reaction of compounds with a carbons-carbon double bond is a addition. -Hydrogenation reaction -Halogenation reaction (X2 / CCl4 ) -Hydrohalogenation reaction (HBr, HCl) -Hydration reaction (H2O)

  17. LOW High Reactive intermediated in organic chemistry

  18. 2. Additionreaction -Hydrogenation reaction (H2) Ni, Pd, Pt cat. -Halogenation reaction (X2 / CCl4 )

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