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NEET 2009
Exam
NEET
Year
2009
Subject
Chemistry
Chapter
Carboxylic Acid Derivatives

NEET 2009 · Chemistry · Carboxylic Acid Derivatives

Propionic acid with Br_2-P yields a dibromo product. Its structure...

Propionic acid with Br2−P\mathrm{Br}_2-\mathrm{P} yields a dibromo product. Its structure would bePropionic acid with Br_2-P yields a dibromo product. Its structure would bePropionic acid with Br_2-P yields a dibromo product. Its structure would bePropionic acid with Br_2-P yields a dibromo product. Its structure would be

Options

  1. ACH2Br−CHBr−COOH\mathrm{CH}_2 \mathrm{Br}-\mathrm{CHBr}-\mathrm{COOH}
  2. BWhich functional group is retained in the primary amine formed by the Hoffmann bromamide degradation?
  3. CCH2Br−CH2−COBr\mathrm{CH}_2 \mathrm{Br}-\mathrm{CH}_2-\mathrm{COBr}
  4. DWhich functional group is retained in the primary amine formed by the Hoffmann bromamide degradation?

Correct answer

D. Which functional group is retained in the primary amine formed by the Hoffmann bromamide degradation?

Step-by-step solution

Key Idea Br2\mathrm{Br}_2 in presence of P\mathrm{P} attacks on α\alpha-carbon atom of acid and α\alpha hydrogen is substituted by bromine. Propionic acid with Br_2-P yields a dibromo product. Its structure would be
This reaction is called Hell-Volhard Zelinsky (HVZ) reduction.
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