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Question
In the preparation of alkynes from vicinal dihalides, the reaction is
In the preparation of alkynes from vicinal dihalides, the reaction is
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Solution
The correct option is A Elimination reaction
Vicinal dihalides on treatment with alcoholic KOH undergo dehydrohalogenation. One molecule of HX is eliminated to form alkenyl halide which on treatment with sodamide gives alkyne.
for example :
1,2-dibromo propane undergoes dehydrohalogenation to give 2-bromoprop-1-ene which on on further tratment with NaNH2 gives prop-1-yne.
Vicinal dihalides on treatment with alcoholic KOH undergo dehydrohalogenation. One molecule of HX is eliminated to form alkenyl halide which on treatment with sodamide gives alkyne.
for example :
1,2-dibromo propane undergoes dehydrohalogenation to give 2-bromoprop-1-ene which on on further tratment with NaNH2 gives prop-1-yne.
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