Question

S 32) on

Answer 1

1. When butanoic acid (
CHRCH2CH2COOH
) is heated with ethanol (
CH CH2OH
) in presence of acid, it forms the required ester as shown above.

2. When butanoyl chloride ($CH_3CH_2CH_2COCl$) is treated with ethanol in presence of pyridine, it forms the required ester as shown above. Pyridine reacts with HCl that is produced.

3. When butanoic anhydride ($(CH_3CH_2CH_2CO)_2O$) is heated with ethanol in presence of acid, it form the required ester and butanoic acid as shown above.