Alkynes - Preparation of Alkynes from Calcium Carbide and Vicinal Dihalides

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  • Methods of preparation of alkynes
  1. Action of water on calcium carbide: Industrial preparation of acetylene
  2. By dehydrohalogenation of vicinal dihalides or geminal dihalides: From vicinal dihalide, From geminal dihalide, Double dehydrohalogenation
  3. By the action of zinc on tetrahalogen derivatives of alkanes (dehalogenation)
  4. Kolbe's electrolysis reaction
  5. By dehalogenation of haloform
  6. Berthelot's synthesis
  7. Synthesis of higher alkynes
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