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Topic: Tollens vs. Fehling  (Read 5493 times)

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Offline FeLiXe

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Tollens vs. Fehling
« on: May 26, 2006, 10:14:00 AM »
Hi, I just read that 4-Methyl-benzaldehyde will react with Tollens-reagent and not with Fehling-reagent. Could someone tell me why?

thanks
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Math and alcohol don't mix, so... please, don't drink and derive!

Offline Donaldson Tan

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Re: Tollens vs. Fehling
« Reply #1 on: May 26, 2006, 10:22:59 AM »
The benzene ring provides reasonance stabilisation to the carbonyl group, thus making it more resistant to oxidation. Fehling is not as strong an oxidising agent as Tollen's
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Offline FeLiXe

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Re: Tollens vs. Fehling
« Reply #2 on: May 26, 2006, 04:16:40 PM »
cool, thanks
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