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2) From sodium acetylides and primary alkyl halides
• Higher alkynes are synthesized by alkylation of
acetylene or terminal alkynes.
• Removal of the acidic hydrogen of terminal alkyne
using sodamide in liquid ammonia followed by
reaction with primary alkyl halides ONLY.
(explanation in alkyl halide lecture)
Chemical properties
Alkynes undergo:
1. Addition reactions, including the addition of:
a. Hydrogen halides (HX),
b. Halogens (X2),
c. Water (H2O)
2 Hydrogenation (Reduction of alkynes)
a. Catalytic hydrogenation
b. Reduction of alkynes to cis alkenes
c. Reduction of alkynes to trans alkenes
3. Oxidation of alkynes
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