Complete the reactions to show how butanoic acid may be converted to butanal.

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03-05-2018
Chemistry

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Complete the reactions to show how butanoic acid may be converted to butanal.

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transitionstate transitionstate · Answer 1 · 2018-05-12T19:35:36+02:00

Butanoic Acid is converted to Butanal in two steps;

Step 1: Conversion of Butanoic Acid into Butyryl Chloride:

Butanoic Acid when treated with Thionyl Chloride gives Butyryl Chloride, SO₂ and HCl gases. This step is selected due to conversion of a bad leaving group (-OH) into a good leaving group (-Cl).

Step 2: Conversion of Butyryl Chloride to Butanal:

In this reaction the Butyryl Chloride is reduced to Butanal by treating Butyryl Chloride with a mild reducing agent i.e. Lithium tri tert-butoxy aluminum hydride.