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What is the principal product obtained when 1,1,1-trichloropropane is heated with aqueous potassium hydroxide?

1. Propyne
2. 1-Propanol
3. 2-Propanol
4. Propionic acid

Correct answer: Propionic acid

Solution

1,1,1-Trichloropropane (CH3CH2CCl3) has three halogens on the same carbon. Aqueous KOH hydrolyses this gem-trihalide all the way to the carboxylic acid, giving CH3CH2COOH (propionic acid).

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