Alkynes - mwit.ac.thteppode/7_Alkyne.pdf · Synthesis of Alkynes by Elimination Reactions. ......
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1 Alkynes Alkynes SORACHAI SAE LIM SORACHAI SAE LIM SORACHAI SAE-LIM SORACHAI SAE-LIM
Transcript of Alkynes - mwit.ac.thteppode/7_Alkyne.pdf · Synthesis of Alkynes by Elimination Reactions. ......
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Hydrogenation of Alkynes
Li dl ’ l l d i lk f Lindlar’s catalyst also produces cis-alkenes from alkynes
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Geminal dihalides can also undergo consecutive dehydrohalogenation reactions to yield the alkyney g y y
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Th A idi f T i l AlkThe Acidity of Terminal Alkynes
Recall that acetylenic hydrogens have a pKa of about 25 and are Recall that acetylenic hydrogens have a pKa of about 25 and are much more acidic than most other C-H bonds
The relative acidity of acetylenic hydrogens in solution is
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Addition of Hydrogen Halides to Alkynes
Markovnikov
Anti MarkovnikovAnti-Markovnikov