Alkynes
These are the acyclic hydrocarbons which contain carbon-carbon triple bond are called alkynes. General formula is CnH2n-2. Ex. Ethyne CH ≡ CH; Propyne CH3 - C ≡ CH
General methods of preparation
- In reaction with gem dihalide, Alc. KOH is not needed for replacement in 2nd step.
- In reaction with vicinal dihalide, if the solvent is 2-butylene chloride then product is 2-butyne as major product.
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