Just one sec...
Hey! Sign in to get help with your study questionsNew here? Join for free to post

Help with difficult structures?

Announcements Posted on
Last chance to win! Our 1984 city-break competition closes on Monday. Post now to enter. 22-07-2016
    • Thread Starter
    Offline

    ReputationRep:
    Need the structural (stick) formula for these molecules:

    N-propylbutanamide

    4-methylhexan-2-ol

    butan-1 4-dioic acid

    methyl methylamine

    Need to name these molecules:

    1)
    O
    ||
    CH3 CH2 CH2 C-NH CH3

    2)

    CH3
    |
    CH3 CH2 N CH3

    3)

    CH3COBr
    O
    ||
    CH3 C--OCH2CH3

    3)

    CH2OH
    |
    CHOH
    |
    CH2OH

    Thanks
    Offline

    ReputationRep:
    What have you got so far?
    • Thread Starter
    Offline

    ReputationRep:
    I've attempted these but I know they're incorrect
    Offline

    ReputationRep:
    So? Your mistakes are important in learning how to rectify them

    N-propylbutanamide
    N-propyl = 3 carbon chain attached to a nitrogen
    butan = 4 carbon chain
    amide = err amide :p:

    4-methylhexan-2-ol
    4-methyl = a CH3 group attached at position 4
    hexan = 6 carbon chain
    2-ol = hydroxy group in the 2 position

    that help at all?
    • Thread Starter
    Offline

    ReputationRep:
    (Original post by EierVonSatan)
    So? Your mistakes are important in learning how to rectify them



    N-propyl = 3 carbon chain attached to a nitrogen
    butan = 4 carbon chain
    amide = err amide :p:



    4-methyl = a CH3 group attached at position 4
    hexan = 6 carbon chain
    2-ol = hydroxy group in the 2 position

    that help at all?
    Thanks. Is this right for N-propylbutanamide?
    http://i46.tinypic.com/25plkdu.jpg
    • Thread Starter
    Offline

    ReputationRep:
    http://i50.tinypic.com/2ed8vo8.jpg 4-methylhexan-2-ol?
    Offline

    ReputationRep:
    (Original post by GaryGlobetrotter)
    Thanks. Is this right for N-propylbutanamide?
    http://i46.tinypic.com/25plkdu.jpg
    I explained that badly, sorry

    Butanamide is CH3CH2CH2CONH2

    The N-propyl bit replaces one of the N-H's above to become:

    CH3CH2CH2CONHCH2CH2CH3

    :yy:

    butan-1 4-dioic acid
    butan = 4 carbon chain

    1,4-dioc acid = carboxylic acids at the 1 and 4 positions

    methyl methylamine
    Not sure if that's a valid name for something, do you mean dimethylamine?
    • Thread Starter
    Offline

    ReputationRep:
    Thanks again.

    I'll ask my teacher about the 'methyl methylamine'.

    Could you provide me with some of your guidance in naming the structures please?
    • Thread Starter
    Offline

    ReputationRep:
    Ahh, the positions messed up! -_-

    Here they are: http://i45.tinypic.com/10xfpt3.jpg
    Offline

    ReputationRep:
    (Original post by GaryGlobetrotter)
    Could you provide me with some of your guidance in naming the structures please?
    I can only make out the last one from your drawings :o:

    It has a 3 carbon chain => propan
    it has 3 alcohol groups => triol

    As the OH's are on a different carbon each: propan-1,2,3-triol is the name

    edit: ah okay

    e) longest chain = ethan
    it's an amine
    there are 2 methyl groups attached to the nitrogen

    f) longest chain = ethan
    COBr = acyl bromide

    g) it's an ester with two carbon chains, which are both ethan
    • Thread Starter
    Offline

    ReputationRep:
    (Original post by EierVonSatan)
    I can only make out the last one from your drawings :o:

    It has a 3 carbon chain => propan
    it has 3 alcohol groups => triol

    As the OH's are on a different carbon each: propan-1,2,3-triol is the name

    edit: ah okay

    e) longest chain = ethan
    it's an amine
    there are 2 methyl groups attached to the nitrogen

    f) longest chain = ethan
    COBr = acyl bromide

    g) it's an ester with two carbon chains, which are both ethan
    Thanks!

    Ok, so...

    e) N-2methylethanamine

    f) Acylethylbromide

    g) Ethyl ethanoate

    ?
    Offline

    ReputationRep:
    (Original post by GaryGlobetrotter)
    e) N-2methylethanamine
    Close. N,N-dimethylethanamine

    The two N's indicate position (like numbers do) the di means there are two of them

    f) Acylethylbromide
    Ethanoyl bromide

    g) Ethyl ethanoate
    :yy:
    • Thread Starter
    Offline

    ReputationRep:
    (Original post by EierVonSatan)
    Close. N,N-dimethylethanamine

    The two N's indicate position (like numbers do) the di means there are two of them



    Ethanoyl bromide



    :yy:
    Thanks for all of your help today. Rep given.
    Offline

    ReputationRep:
    (Original post by GaryGlobetrotter)
    Thanks for all of your help today. Rep given.
    Welcome :yy:

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. Oops, you need to agree to our Ts&Cs to register
  2. Slide to join now Processing…

Updated: May 15, 2012
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

Poll
Bourne or Bond?

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

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