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The reaction between alkenes and concentrated sulphuric acid (including further reaction to give alcohols). Reaction with potassium manganate(VII) . . . The reaction between alkenes and potassium manganate(VII) (potassium permanganate) solution. Hydration . . . The industrial hydration of alkenes (their reaction with
We'll look at the reaction with ethene. Other alkenes react in just the same way.Manganate (VII) ions are a strong oxidising agent, and in the first ins
1 Feb 2014 Joined: Jan 2012; Posts: 3,448. all explained with equations on the excellent Chemguide site. chemguide.co.uk/organicprops/alkenes/kmno4.html
Mild Oxidizing Conditions Examples. 1. Hydroxylation of ethene (ethylene). Hydroxylation of ethene (ethylene), CH2=CH2, using cold, alkaline potassium permanganate solution.
Alkenes can easily be oxidized by potassium permanganate and other oxidizing agents. What products form depend on the reaction conditions. At cold temperatures.
Read the section headed "Oxidation of alkenes with hot concentrated acidified potassium manganate(VII) solution", down as far as the green box which says "Warning!". Then what I suggest you do for now is to make a note of the summary further down the page (which I will repeat below), but also make a note to come back
Alkenes react with potassium manganate(VII) solution in the cold. The colour change depends on whether the potassium manganate(VII) is used under acidic or alkaline conditions. If the potassium manganate(VII) solution is acidified with dilute sulphuric acid, the purple solution becomes colourless.
28 Nov 2016 Oxidation of alkenes with hot concentrated acidified potassium manganate(VII) solution. The diols, such as ethane-1,2-diol, which are the products of the reaction with cold dilute potassium manganate(VII), are themselves quite easily oxidized by manganate(VII) ions.

21 Apr 2016
     

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