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    Can someone please name this alcohol for me and explain the how you figured it out?
    (C2H5)3COH
    The book calls it 3-ethylpentan-3-ol but I have no idea how they got that
    Thanks
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    you find the longest carbon chain so draw it out

    you get a C in the middle with four branches three with C2H5 and one with 0H
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    draw it out first with all the bonds
    then ill explain it
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    Hi

    I think it is 3-ethylpentan-3-ol

    If you draw out the molecule and follow the rules of naming (longest chain etc.) you get the answer
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    (Original post by EL77)
    Can someone please name this alcohol for me and explain the how you figured it out?
    (C2H5)3COH
    The book calls it 3-ethylpentan-3-ol but I have no idea how they got that
    Thanks
    The book actually is not quite correct, the 3- is redundant.

    Step 1: Identify the longest unbroken chain.

    C-C-C-C-C

    There are 5 carbon atoms so it's based on the root 'pent'

    C-C-C(C2H5)-C-C

    There is a branch with 2 carbons (ethyl) on carbon number 3, however it can't go anywhere else without lengthening the chain, so it's position does not need a locant.

    Finally there is a hydroxy group on carbon number 3. This takes priority as it is the only functional group, so the molecule becomes a pentan-3-ol.

    ethylpentan-3-ol
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    (Original post by EL77)
    Can someone please name this alcohol for me and explain the how you figured it out?
    (C2H5)3COH
    The book calls it 3-ethylpentan-3-ol but I have no idea how they got that
    Thanks
    There is a carbon with 3 ethyl groups and 1 hydroxyl group. When we draw out the full structural formula, you realise that there is a straight carbon chain that is five carbons long - hence the 'pentan.' There is a hydroxyl group on the third carbon on the chain, hence '-3-ol.' There is an ethyl group on this same carbon, hence '3-ethyl.' Therefore the name is 3-ethylpentan-3-ol.
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    thank you everyone, i understand it now!
 
 
 
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