DNP test Flashcards
1
Q
What does DNP stand for
A
Dinitrophenyl hydrazine
2
Q
What does DNP test for?
A
Test for aldehydes and ketones
3
Q
What reagent does the DNP use?
A
2,4-dinitrophenylhydrazine
4
Q
This reagent reacts in a condensation reaction to produce what colors
A
Highly colored yellow. Orange. Red precipitates
5
Q
What does red or orange precipitates indicate?
A
That the ketone or aldehyde group is conjugated to unsaturated substiutuents such as benzene rings, or c=c bonds.
6
Q
The condensation of diphenylhydrazines with ketone and aldehydes produces
A
Hydrozenes. Where a C=N bond replaces the original C=O bond of the ketone or functional group
7
Q
Does the reagent react with C=O bond of esters, carboxylic acids or amines?
A
No
