Results are out! Find what you need...fast. Get quick advice or join the chat
Hey there Sign in to join this conversationNew here? Join for free

How to distinguish between amines, amides and nitriles?

Announcements Posted on
    • Thread Starter
    • 7 followers
    Offline

    ReputationRep:
    hi,

    I'm struggling to answer a question my chemistry teacher set. He asked us to imagine we had any equipment needed but only the following chemicals to determine which of 3 unknown compounds is the nitrile, amine and amide.

    NaOH, H2SO4, Sodium Carbonate, Indicators/Test Papers, Brady's, Tollen's, Triiodoform, Sodium Nitrite

    so far I have got:

    Amide: add NaOH --> nothing happens --> heat --> test gas with damp red litmus/indicator paper --> blue (due to ammonia given off)

    not sure how to test for amines/nitriles as they both seem to do the same things chemically :s

    any help is appreciated
    • 2 followers
    Online

    ReputationRep:
    Amines are bases so can be detected with indicator, leaving the last one to be the nitrile.
    • 48 followers
    Offline

    ReputationRep:
    Any equipment? An IR spectrometer would make quick work of it
    • 2 followers
    Online

    ReputationRep:
    (Original post by EierVonSatan)
    Any equipment? An IR spectrometer would make quick work of it
    Yeah I thought that but you don't see them very often in schools!!
    • 48 followers
    Offline

    ReputationRep:
    (Original post by illusionz)
    Yeah I thought that but you don't see them very often in schools!!
    No true, but I don't think it's an experiment that will actually be done. Chemical tests should be avoided where ever possible :p:
    • 2 followers
    Online

    ReputationRep:
    (Original post by EierVonSatan)
    No true, but I don't think it's an experiment that will actually be done. Chemical tests should be avoided where ever possible :p:
    Yeah, it's strange. 2 years of organic/inorganic work at university and also worked for about 6 months at an organic synthetic chemical company, I've only ever used nmr/IR to work out what I've got, never chemical tests. Seems rather pointless teaching it at schools.

    The same applies to an extend with the iupac nomenclature.

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. By joining you agree to our Ts and Cs, privacy policy and site rules

  2. Slide to join now Processing…

Updated: March 10, 2011
New on TSR

So how did you do?

Come into the GCSE forum to share your grades

Article updates
Reputation gems:
You get these gems as you gain rep from other members for making good contributions and giving helpful advice.