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How can methyl magnesium bromide be converted to propanoic acid?(a) Jones reagent(b) KMnO4-KOH; heat(c) H3O^+; heat(d) CO2-dry ether; H3o^+This question was posed to me in examination.My question is from Methods of Carboxylic Acids Preparation in portion Aldehydes, Ketones and Carboxylic Acids of Chemistry – Class 12

Answer»

Correct choice is (d) CO2-dry ether; H3o^+

To elaborate: Methyl magnesium bromide (Grignard REAGENT) on REACTION with CO2 forms an ADDITION product containing an additional C carbon atom. This is DECOMPOSED in the presence of mineral ACID to form propanoic acid.



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