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Treating an amine sample with D2O makes which 1H NMR signals vanish?
AAlpha C-H signals
BAromatic C-H signals
CMethyl C-H signals
DN-H proton signals
Answer & Solution
Correct answer: D. N-H proton signals
The N-H protons exchange with deuterium, which is silent in 1H NMR, so those signals disappear.
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