oxidation of alkenes

Question

Cold, dilute alkaline KMnO4 treatment of alkene gives:

RankGuru · Accepted Answer

1. **Baeyer's Reagent**: Cold, dilute, alkaline Potassium Permanganate ($KMnO_4$) is known as Baeyer's reagent.
2. **Function**: It is used for the detection of unsaturation (decolorizes the purple purple solution).
3. **Chemical Transformation**: It adds two hydroxyl ($-OH$) groups across the double bond via a cyclic manganese ester intermediate.
4. **Stereochemistry**: The addition is **syn** (both $-OH$ groups add on the same side).
5. **Product**: A **vicinal diol** (glycol) is formed. For example, ethene $	o$ ethylene glycol.

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oxidation of alkenes

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