2,4-DNPH Watch

Mike_123
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I'm stuck on this question:



The answer is B, but I'm unsure why.

Does Brady's reagent test for:

  1. C=O bond, or
  2. just the presense of aldehyde/ketone


I am also unsure of the reactions between benzocaine and NaOH and HCl.

I thank all help in advance, and I would be grateful if you could quote me upon response.
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Borek
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Think about protonation and hydrolysis.
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Just ZK
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(Original post by Mike_123)
I'm stuck on this question:



The answer is B, but I'm unsure why.

Does Brady's reagent test for:

  1. C=O bond, or
  2. just the presense of aldehyde/ketone


I am also unsure of the reactions between benzocaine and NaOH and HCl.

I thank all help in advance, and I would be grateful if you could quote me upon response.
First of all bradys reagent is test for only aldehyde/ketones.
Next u dont need to know the reaction given above. What u need to know is just the functional groups, so here the functional group is an ester ( not a carboxylic acid) along with benzene. So u need to remember te reactions of esters, here benzocaine will react with the acid (acid hydrolysis) and with the base ( base hydrolysis/ saponification).
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