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Topic: Black p-benzoquinone  (Read 3687 times)

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Offline Bakterien

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Black p-benzoquinone
« on: November 08, 2013, 12:41:13 PM »
I need p-benzoquinone for my reaction but the only one i found is very dark, almost black. It should be yellow crystals. On the label i can read +98%. I did a H-NMR and it was clean. Why is it black? Can I use it?
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Offline zsinger

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Re: Black p-benzoquinone
« Reply #1 on: November 08, 2013, 02:42:53 PM »
Wacker Oxidation?  Yes, you can, but use extreme caution when running that, as you are never quite sure how active that P-benzo is……….Double bond changes to the carbonyl……then the addition of….well……you have fun.
 
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Offline opsomath

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Re: Black p-benzoquinone
« Reply #2 on: November 11, 2013, 09:34:34 AM »
It sublimes nicely if you want to purify it.
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