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Oxone® (KHSO NaCI (15)-bomeol e ethylI acetate(1s)-camphor 4. The reaction you p

ID: 577711 • Letter: O

Question

Oxone® (KHSO NaCI (15)-bomeol e ethylI acetate(1s)-camphor 4. The reaction you performed to oxidize borneol to camphor is shown above. This reaction was quenched with sodium sulfite (Na SO,) prior to work-up. a) (10 points) match each reagent on the left with its role on the right. ethyl acetate Oxone sodium chloride sodium sulfate catalyst drying agent oxidizing agent reducing agent solvent sodium sulfite b) (4 points) After quenching with sodium sulfite, the reaction mixture was tested wi iodide paper. What was the purpose of this test?

Explanation / Answer

4 a)

ethyl acetate - solvent

oxone - oxidizing agent
sodium chloride - catalyst
sodium sulfate - drying agent

sodium sulfite - reducing agent

b)

Starch-iodide paper was used to indicate if the oxidant is present. If any oxidizing agent was present I- will be oxidized to I2, which will further react to form I3- (blue-black). If there is no more oxidizing agent present, I- would remain and no color change will be observed. This also indicates that all trace oxidizing agents have been efficiently reduced by sodium sulfite