Carboxylic acid can be formed by reaction of Grignard reagent with:
Correct answer: B. Carbon dioxide
- A. Carbonate
- B. Carbon dioxide
- C. Aldehyde
- D. Carbon mono oxide
Explanation
A Grignard reagent adds to carbon dioxide (dry ice) and the product on acid hydrolysis gives a carboxylic acid with one more carbon atom. Aldehydes give secondary alcohols with Grignard reagents (methanal gives a primary alcohol), so they are not a route to acids.
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About Nomenclature, Structure and Preparation
Carboxylic acids are prepared by oxidising primary alcohols or aldehydes, hydrolysing nitriles, esters and amides, and carbonating suitable organometallic compounds. Their structures, IUPAC naming, resonance stabilisation and acidic character explain why carboxylic acids differ from alcohols and phenols, despite all containing oxygen and hydrogen.
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More Nomenclature, Structure and Preparation questions
Choose the True product of the following reaction?CH3C≡N+2H2O+HCl→
Methanoic acid HCOOH has one carbon-oxygen bond of length 123 PM and another of 136 PM. The C = O and C-O bond lengths respectively would be:
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Dry CO2 is passed through grignard reagent in the presence of either as a solvent. The intermediate is decomposed with diluted HCI giving a compound 'X' identity 'X'.