PCC Oxidation: Primary Alcohols → Aldehydes (Stops Before Carboxylic Acids)

Learn PCC oxidation mechanism via chromate ester formation and elimination. Why it stops at aldehydes, and how it differs from Jones oxidation.

Reaction: 1° ROH → RCHO; 2° ROH → ketone
What it does: Oxidizes alcohols without aqueous over-oxidation
Typical reagents: PCC, CH2Cl2 (anhydrous)
Key intermediate: Chromate ester
Driving force: E2-like elimination to form C=O
Exam type: Reagent selection
Exam type: Predict product

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