Question:

PCC is :

Updated On: Apr 7, 2025
  • K2Cr2O7 + Pyridine
  • CrO3 + CHCl3
  • CrO3 + H2SO4
  • A complex of chromium trioxide with pyridine + HCL
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The Correct Option is D

Approach Solution - 1

  • Pyridinium chlorochromate (PCC) is a mild oxidizing agent used primarily to oxidize primary alcohols to aldehydes and secondary alcohols to ketones without affecting other functional groups.
  • PCC is prepared by reacting chromium trioxide (CrO₃) with pyridine and hydrochloric acid (HCl), forming a complex that is the actual oxidizing agent.

Thus, PCC is a complex of chromium trioxide with pyridine and HCl, making option (D) the correct answer.

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Approach Solution -2

Pyridinium chlorochromate (PCC) is a reagent formed by reacting chromium trioxide (CrO₃) with pyridine, and often involves the addition of HCl to complete the preparation. PCC is a mild oxidizing agent that selectively oxidizes primary alcohols to aldehydes and secondary alcohols to ketones.

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