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    I have a question with 3 molecules listed and I'm asked to name in which the hemiacetal structure is found. I have sucessfully found one. However the other two don't look like hemiacetals to me. But one of them is?


    ch3och2ch2oh

    and

    ch3och2oh

    Are these not both alcohols? Di-Propanol and Di-Ethanol?
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    (Original post by byebyebadman)
    ch3och2ch2oh

    and

    ch3och2oh

    Are these not both alcohols? Di-Propanol and Di-Ethanol?
    No? :p: In each molecule you have an 'ether link' and a free OH.

    A hemiacetal has a carbon attached to two oxygens - one as an 'ether' the other as a free OH
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    (Original post by EierVonSatan)
    No? :p: In each molecule you have an 'ether link' and a free OH.

    A hemiacetal has a carbon attached to two oxygens - one as an 'ether' the other as a free OH
    Oh....I'm rather useless at converting shorthand to structures (especially in my head). So is the second one I wrote a hemiacetal then? And the first longer molecule is a..... 2- ethoxy ethanol?
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    (Original post by byebyebadman)
    Oh....I'm rather useless at converting shorthand to structures (especially in my head). So is the second one I wrote a hemiacetal then? And the first longer molecule is a..... 2- ethoxy ethanol?
    Yes, the bottom one is the hemiacetal The top one is called 2-methoxyethanol :yes:
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    (Original post by EierVonSatan)
    Yes, the bottom one is the hemiacetal The top one is called 2-methoxyethanol :yes:
    Thanks for that. And oh yes, it was a methoxy not ethoxy.

    Cheers again.

    So is the clue to spotting ehters in shorthand form just seeing a R-OCH2-
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    (Original post by byebyebadman)
    Thanks for that. And oh yes, it was a methoxy not ethoxy.

    Cheers again.

    So is the clue to spotting ehters in shorthand form just seeing a R-OCH2-
    Yeah :yy:
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    Also related question.....

    Are acetals just diethers? Obviously with the ethers attatched to the same C?
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    (Original post by byebyebadman)
    Also related question.....

    Are acetals just diethers? Obviously with the ethers attatched to the same C?
    You can think of it like that, yes :yep:
 
 
 
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