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    Which peaks does D2O remove from the NMR spectra?


    Thanks
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    Anything with a freely interchangeable proton. Chiefly -OH and NH2 peaks, I suppose.
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    What about -COOH?
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    (Original post by Kenny135)
    What about -COOH?
    no they'll still show up

    I think its electronegative bonds which swap hydrogen with Deuterium

    Edit: ignore me...COOH has a O-H bond. The deuterium can exchange with the the Hydrogen!
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    COOH should exchange too :yep:
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    so N-H, O-H and COOH?
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    Yes.
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    Thanks - are N-H protons liable to interchange - due to their basic nature?
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    As mentioned above, N-H protons are liable to exchange. Sometimes you will see typically exchangeable protons in a spectrum when they are locked into a particularly strong intramolecular hydrogen bond but for the purposes of A level, NH, OH and COOH are always exchanged.
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    (Original post by Kenny135)
    Thanks - are N-H protons liable to interchange - due to their basic nature?
    I've never really thought about it, but I suppose so. Anything where one proton readily drops off and one readily associates, regardless of the order, is likely to interchange. So anything quite acidic/quite basic.

    EDIT: Or, in the case of ethanol, almost neutral. :o: Thinking about it, it's a kinetic issue rather than a thermodynamic one, so it's probably not related to the basicity, but rather the lability of the dissociation/association.
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    What about NH2 (amine) and CONH2(amide)? Will D2O replace the H of tis 2 functional group?
    For Cambridge A level exam, what is the ALL type of functional group that D2O can replace?
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    U guys already mention for Cambridge A level purpose, NH, COOH, OH , always can exchange with D2O. Then NH2 included too?
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    How about SH bonds?
 
 
 
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