Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    10
    ReputationRep:
    For the H NMR of propyl methanoate, I have predicted 4 different proton environments (H-C=O, O-CH2, CH2-CH2-CH3, CH2-CH3)

    Can someone confirm if this is correct or not please?
    Offline

    2
    ReputationRep:
    (Original post by popo111)
    For the H NMR of propyl methanoate, I have predicted 4 different proton environments (H-C=O, O-CH2, CH2-CH2-CH3, CH2-CH3)

    Can someone confirm if this is correct or not please?
    yep thats what i got aswell
    Offline

    2
    ReputationRep:
    I would say 4 is correct.
    • Thread Starter
    Offline

    10
    ReputationRep:
    (Original post by nutcase13)
    yep thats what i got aswell
    Ok thanks!

    For the last 2 ones, would you recommend to write it like that or shall I just write R-CH2 and R-CH3? It wouldn't really make a difference would it?
    Offline

    2
    ReputationRep:
    (Original post by popo111)
    Ok thanks!

    For the last 2 ones, would you recommend to write it like that or shall I just write R-CH2 and R-CH3? It wouldn't really make a difference would it?
    i dont think it would make a difference tbh, although if you just wrote it out as CH2 there may be confusion as to which one of the CH2's you are referring to, so maybe your way is better?
    • Thread Starter
    Offline

    10
    ReputationRep:
    (Original post by nutcase13)
    i dont think it would make a difference tbh, although if you just wrote it out as CH2 there may be confusion as to which one of the CH2's you are referring to, so maybe your way is better?
    Ok cool!

    Last thing, I'm slightly confused, for the H-C=0 group, is it at 9-10 chemical shift? (not the HC-C=0)?
    Offline

    2
    ReputationRep:
    (Original post by popo111)
    Ok cool!

    Last thing, I'm slightly confused, for the H-C=0 group, is it at 9-10 chemical shift? (not the HC-C=0)?
    yep looks like it
    Offline

    17
    ReputationRep:
    You can usually look them up, here:http://sdbs.db.aist.go.jp/
    But propyl formate's NMR is missing.

    Instead, you can predict it, here:
    http://www.nmrdb.org/
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Has a teacher ever helped you cheat?
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Write a reply...
    Reply
    Hide
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.