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How will an alkene react with dilute, cold, neutral $\ce{KMnO4}$?

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  • $\begingroup$ @YashasSamaga We prefer to not use MathJax in the title field, see here for details. $\endgroup$ Commented Mar 31, 2017 at 5:29

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The behaviour of $\ce{KMnO4}$ in a neutral medium is nearly the same as its behaviour in slightly alkaline medium.

In alkaline medium:

$\ce{3R-CH=CH-R + 2MnO4- + 2OH- -> R-CH(OH)-CH(OH)-R + MnO4^2-}$

In neutral medium:

$\ce{3R-CH=CH-R + 2MnO4- + 4H2O -> R-CH(OH)-CH(OH)-R + MnO2 + 2OH-}$

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  • $\begingroup$ Wow, interesting. I wasn't expecting that. Thank you for your help! $\endgroup$
    – user42041
    Commented Mar 30, 2017 at 2:54

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