Identify which method is used to prepare alkynes?
Correct answer: C. Dehalogenation of Vicinal Dihalides in the Presence of Strong Base.
- A. Dehalogenation of Vicinal Dihalides in the Presence of Methanol.
- B. Dehydration of alcohols in the presence of Al₂O₃ at 340-450 degrees centigrade.
- C. Dehalogenation of Vicinal Dihalides in the Presence of Strong Base.
- D. Electrolysis of unsaturated dicarboxylic acid salts.
Explanation
A strong base (like alcoholic KOH or NaNH₂) can remove two equivalents of HX from a vicinal dihalide to yield an alkyne. Hence, option C is correct.
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About Chemistry of Hydrocarbons
Hydrocarbons are studied through the structures and reactions of alkanes, alkenes, alkynes and aromatic compounds. Coverage includes free radical substitution in alkanes, electrophilic addition to carbon-carbon multiple bonds, benzene substitution, aromatic stability and the difference between addition reactions of alkenes and substitution reactions of benzene.
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