organic chem Q .

[tRNA]

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1) http://en.wikipedia.org/wiki/Morpholine
in this cyclic structure of morpholine, why does the H connected directly to the Nitrogen not show a triplet peak in the NMR spectra? it says in kaplan that any atom with an odd atomic number OR an odd mass number is NMR active, so why doesn't that H show a triplet?

 

[ucla2134]

1) http://en.wikipedia.org/wiki/Morpholine
in this cyclic structure of morpholine, why does the H connected directly to the Nitrogen not show a triplet peak in the NMR spectra? it says in kaplan that any atom with an odd atomic number OR an odd mass number is NMR active, so why doesn't that H show a triplet?

As far as i know, H bond to carbonyl C=O, or carboxylic acids and amine do not participate in splitting since it frequently exchange or lose the H to water or other compound. It can participate in splitting if the compound is in the anhydrous condition (there is no water to form hydrogen bonded with).