Turn on thread page Beta
    • Thread Starter
    Offline

    11
    ReputationRep:
    I was just wondering if anyone could help. I am trying to find the IUPAC name of this carboxylic acid with the structural formula (CH3)2CH(OH)CH2COOH - I've tried drawing out the displayed formula but keep getting confused as to where the OH would go. If anyone could help, I'd be extremely grateful!
    Offline

    14
    ReputationRep:
    (Original post by Lydia.Mx)
    I was just wondering if anyone could help. I am trying to find the IUPAC name of this carboxylic acid with the structural formula (CH3)2CH(OH)CH2COOH - I've tried drawing out the displayed formula but keep getting confused as to where the OH would go. If anyone could help, I'd be extremely grateful!
    The if there is an OH group in the molecule as you say, then the formula should be (CH3)2C(OH)CH2COOH (not (CH3)2CH(OH)CH2COOH) as that carbon would have 5 things bonded to it, which isn't right). I've underlined the groups bonded to the bolded C for clarity. That OH is bonded to the C to the left of it. I think that should help somewhat
    • Thread Starter
    Offline

    11
    ReputationRep:
    (Original post by Professor L)
    The if there is an OH group in the molecule as you say, then the formula should be (CH3)2C(OH)CH2COOH (not (CH3)2CH(OH)CH2COOH) as that carbon would have 5 things bonded to it, which isn't right). I've underlined the groups bonded to the bolded C for clarity. That OH is bonded to the C to the left of it. I think that should help somewhat
    Thank you so much - this is extremely helpful! It was written on a homework sheet I was given & I was thinking it was werid as carbon can only 4 atoms bonded to it so that would make a lot more sense, thank you
    I think that would make it 3-hydroxy-4-methylpentanoic acid
    Offline

    10
    ReputationRep:
    (Original post by Professor L)
    The if there is an OH group in the molecule as you say, then the formula should be (CH3)2C(OH)CH2COOH (not (CH3)2CH(OH)CH2COOH) as that carbon would have 5 things bonded to it, which isn't right). I've underlined the groups bonded to the bolded C for clarity. That OH is bonded to the C to the left of it. I think that should help somewhat
    would it be 1,1-methyl,2hydroxyl butanoic acid . im just starting as nomenclature so i didint know what to do about the hydroxyl group ?
    • Thread Starter
    Offline

    11
    ReputationRep:
    (Original post by emilysandres)
    would it be 1,1-methyl,2hydroxyl butanoic acid . im just starting as nomenclature so i didint know what to do about the hydroxyl group ?
    That is what threw me! I've literally sat trying to work it out for about an hour! I just worked it out to be 3-hydroxy-4-methylpentanoic acid I think (I might be wrong) but I think you would count the other way to ensure you have the group with the highest priority (carboxylic acid) as 1 & then the hydroxyl group would be on its own carbon next to the methyl groups. It honestly confuses me so much haha - thanks so much for your help though - I really appreciate it!!
    Offline

    10
    ReputationRep:
    (Original post by Lydia.Mx)
    That is what threw me! I've literally sat trying to work it out for about an hour! I just worked it out to be 3-hydroxy-4-methylpentanoic acid I think (I might be wrong) but I think you would count the other way to ensure you have the group with the highest priority (carboxylic acid) as 1 & then the hydroxyl group would be on its own carbon next to the methyl groups. It honestly confuses me so much haha - thanks so much for your help though - I really appreciate it!!
    oh yeah forgot about that argh so many rules haha .
    • Thread Starter
    Offline

    11
    ReputationRep:
    (Original post by emilysandres)
    oh yeah forgot about that argh so many rules haha .
    Tell me about it haha!
    Offline

    10
    ReputationRep:
    (Original post by Lydia.Mx)
    Tell me about it haha!
    if this is homework, can you let me know the answer when you find out ?
    thanks
    • Thread Starter
    Offline

    11
    ReputationRep:
    (Original post by emilysandres)
    if this is homework, can you let me know the answer when you find out ?
    thanks
    Yes of course, its due Wednesday & we usually go over it in the lesson so I'll let you know then
    Offline

    14
    ReputationRep:
    (Original post by Lydia.Mx)
    Thank you so much - this is extremely helpful! It was written on a homework sheet I was given & I was thinking it was werid as carbon can only 4 atoms bonded to it so that would make a lot more sense, thank you
    I think that would make it 3-hydroxy-4-methylpentanoic acid
    You nearly got it! You have to look at the longest possible unbranching carbon chain in the molecule, which is 4 carbons long in this molecule, so it would be a butanoic acid. Then you have both the OH and the methyl on carbon 3.
    • Thread Starter
    Offline

    11
    ReputationRep:
    (Original post by Professor L)
    You nearly got it! You have to look at the longest possible unbranching carbon chain in the molecule, which is 4 carbons long in this molecule, so it would be a butanoic acid. Then you have both the OH and the methyl on carbon 3.
    Ahh no! Okay great, that makes sense - thanks so much for your help, I really appreciate it!
    Offline

    10
    ReputationRep:
    (Original post by Lydia.Mx)
    Ahh no! Okay great, that makes sense - thanks so much for your help, I really appreciate it!
    Are you in year 12?
    • Thread Starter
    Offline

    11
    ReputationRep:
    (Original post by emilysandres)
    Are you in year 12?
    yes I am, are you?
    Offline

    10
    ReputationRep:
    (Original post by Lydia.Mx)
    yes I am, are you?
    Yeah
    • Thread Starter
    Offline

    11
    ReputationRep:
    (Original post by emilysandres)
    Yeah
    cool! What other subjects are you taking?
    Offline

    14
    ReputationRep:
    (Original post by Lydia.Mx)
    Ahh no! Okay great, that makes sense - thanks so much for your help, I really appreciate it!
    You're welcome!
    Offline

    10
    ReputationRep:
    (Original post by Lydia.Mx)
    cool! What other subjects are you taking?
    Biology and psychology
    How about you?
    • Thread Starter
    Offline

    11
    ReputationRep:
    (Original post by emilysandres)
    Biology and psychology
    How about you?
    Oh cool! Biology, geography and core maths
    Offline

    10
    ReputationRep:
    (Original post by Lydia.Mx)
    Oh cool! Biology, geography and core maths
    You do four. Wow. Good luck.
    Are you planning on dropping one after a year or doing 4 ?
    • Thread Starter
    Offline

    11
    ReputationRep:
    (Original post by emilysandres)
    You do four. Wow. Good luck.
    Are you planning on dropping one after a year or doing 4 ?
    Haha thanks, its not as bad as it sounds - At my school we have electives which we have to take which are one year courses so either work experince, volunteering, EPQ, core maths or further maths & core maths is basically just maths but more problem solving type things so not as hard as A level maths but it just helps with the maths in the sciences & is equivalent to an As grade & the exam is in May so I won't be doing that next year
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: December 10, 2018

University open days

  • University of East Anglia
    All Departments Open 13:00-17:00. Find out more about our diverse range of subject areas and career progression in the Arts & Humanities, Social Sciences, Medicine & Health Sciences, and the Sciences. Postgraduate
    Wed, 30 Jan '19
  • Solent University
    Careers in maritime Undergraduate
    Sat, 2 Feb '19
  • Sheffield Hallam University
    City and Collegiate Campus Undergraduate
    Sun, 3 Feb '19
Poll
Brexit: Given the chance now, would you vote leave or remain?

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.