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Question

For oxidizing alcohols, several oxidants – each with a multivalent central atom as the active species – can be used. When Dess-Martin periodinane (DMP), with I as the multivalent atom is used, how many bonds to oxygen atoms does each central multivalent atom have just before and immediately after the oxidation respectively?


A

7 – before, 5 – after

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B

6 – before, 4 – after

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C

5 – before, 3 – after

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D

4 – before, 2 – after

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Solution

The correct option is D

4 – before, 2 – after


Without going into an actual reaction, let us take a look at only the DMP reagent that gets reduced:

4 bonds with oxygen before and 2 bonds with oxygen post reduction.


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