Does NH[SUB]3[/SUB] react with aldehyde ?

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Ammonia (NH3) does react with compounds that have an aldehydic group, typically forming imines through an acid-catalyzed reaction. However, glucose, despite having a small percentage of its molecules in an open-chain form with a free aldehydic group, does not react with ammonia. This is attributed to the predominant ring structure of glucose, which lacks a free aldehydic group. The reaction's pH dependency may also play a role, as the conditions under which the open-chain form exists could inhibit the reaction with NH3. Thus, the conclusion that glucose does not react with ammonia is supported by its structural properties and the conditions affecting the reaction.
leojun
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does NH3 react with compounds having aldehydic group?(if,yes.why doesn't glucose react with NH3. 0.02% of glucose has open chain structure that has free aldehydic group) In my textbook its given that NH3 doesn't react with glucose and this led to the conclusion that glucose had ring structure with no free aldehydic group.
 
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Ammonia (or amines) plus aldehydes do react to form imines; the reaction is acid catalyzed (pH dependent), and pH of the "0.02% open chain glucose" might interfere.
 

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