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The compound shown is cleaved with periodic acid. Each molecule gives two molecules of the same organic product. Which structure is that product?

  1. AStructure A
  2. BStructure B
  3. CStructure C
  4. DStructure D

Answer: B

The compound is butane-2,3-diol, a vicinal diol. cleaves the C-C bond between the two carbinol carbons; each half becomes ethanal (). Aldehydes are not oxidised further by periodic acid.
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