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Functional group in aspartame molecule

  1. Jun 26, 2014 #1
    1. The problem statement, all variables and given/known data

    which functional group is present in aspatame molecule?

    2. Relevant equations

    3. The attempt at a solution

    why the carbonyl group COO- is not present in the diagram? I can find it in the diagram

    Attached Files:

  2. jcsd
  3. Jun 27, 2014 #2
    -COO- is not carbonyl, its for ester. Carbonyl is simply -CO-.
  4. Jun 29, 2014 #3
    yes , i noted . but can you try to answer my question please? thanks... the C0- grouo is present in the molecule
  5. Jun 29, 2014 #4
    No, it is not present. Rather, you have -CONH- which is an amide and -COO-, which is an ester.
  6. Jun 29, 2014 #5


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    Staff: Mentor

    It is always a part of other functional group, not a functional group alone (like in acetone).

    But to be honest I don't like the question - carbonyl is so characteristic it retains some of its properties even when it is a part of the larger functional group, so I agree the way question is constructed can be confusing and misleading.
  7. Jun 29, 2014 #6


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    Science Advisor
    2017 Award

    The question would have been more clear is they said ketone rather than carbonyl. I would say the C=O group in amides, esters, and carboxylic acids all count as carbonyls, but they don't count as ketones.
  8. Jun 29, 2014 #7
    but, the general sturucture of amide is as follow, am i right? but i cant find this continuous in the diagram? can you be more specific , helping me by circling out the part so that i can see it more clearly?

    Attached Files:

  9. Jun 30, 2014 #8


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    Staff: Mentor

    What you have drawn is not an amide, it is an alpha aminoacid.

    Amide needs a direct connection of carbonyl to nitrogen.
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