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NEETChemistryAldehydes and Ketones

When ethanal is treated with dilute NaOH , a major organic product is formed. What is the IUPAC name of this product?

Options

  1. ABut-2-enal
  2. B2-Hydroxybutanal
  3. CButan-1-ol
  4. D3-Hydroxybutanal

Correct answer

D. 3-Hydroxybutanal

Step-by-step solution

Ethanal ( CH ₃ CHO ) contains -hydrogen atoms. When treated with dilute NaOH , it undergoes an aldol addition reaction. One molecule of ethanal forms an enolate ion which acts as a nucleophile and attacks the carbonyl carbon of a second ethanal molecule. The reaction proceeds as follows: CH ₃ CHO + CH ₃ CHO dil. NaOH CH ₃- CH ( OH )- CH ₂- CHO The product is a -hydroxy aldehyde. Numbering the principal carbon chain starting from the aldehyde carbon, the hydroxyl group is at the 3rd position. Hence, the IUPAC name o

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