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Topic: reaction of carbonyl grops with 2,4-dinitrophenylhydrazine.  (Read 3371 times)

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Offline joemok

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reaction of carbonyl grops with 2,4-dinitrophenylhydrazine.
« on: April 07, 2007, 01:34:57 PM »
From Whiki, i see that only aldehyde or ketone have reactions with 2,4-dinitrophenylhydrazine.
It explains the inactivity of carboxylic acids, amides, and esters by resonance.
How about acid chloride and acid anhydride? They seem not to be resonance stabilized.

Offline FeLiXe

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Re: reaction of carbonyl grops with 2,4-dinitrophenylhydrazine.
« Reply #1 on: April 09, 2007, 10:16:19 AM »
first: you do have a weak +M from the Cl in an acid chloride and from the O in an anhydride

second: with acid derivatives you'd expect a substitution (product hydrazide) and not a condensation (leading to hydrazone)
Math and alcohol don't mix, so... please, don't drink and derive!

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