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    I'm naming an alkene, I've got prefixes of hydroxy, methyl, bromo, chloro and iodo. Which goes first and why?

    Thanks for any help
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    bromo, chloro, iodio because they are priority groups THEN your methyl. Cl, Br, I2..(BTW Go in alphabetical order if you got two of all of them)
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    Name the halogens first in alphabetical order then hydroxy groups then methyl! If they are the only groups then leave the hydroxy out and name it ...-ol! Hope this helps!
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    Normally put them in order of alphabet (excluding bi,tri etc. put in order of the letter of Chloro or Iodo etc.)2-chloro-1-iodoethane
    They also allow in order of numbers. 1-iodo-2-chloroethane. But mostly alphabetical
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    Brilliant! Thanks a lot
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    (Original post by Ben :))
    Name the halogens first in alphabetical order then hydroxy groups then methyl! If they are the only groups then leave the hydroxy out and name it ...-ol! Hope this helps!
    Thanks for the help
    What's the reason why the hydroxy goes before the methyl? Is it because that's alphabetical order or some other reason?
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    (Original post by TomTheImp)
    Thanks for the help
    What's the reason why the hydroxy goes before the methyl? Is it because that's alphabetical order or some other reason?
    It's just the way we've been taught it - I presume alphabetical!
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    (Original post by Ben :))
    It's just the way we've been taught it - I presume alphabetical!
    Haha ok thank you
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    My main Q is, what is the priority functional group? It isn't the alkene, given the info provided, it'd be the alcohol group.

    i.e. CBrClIC(CH3)=CHOH is a 3-bromo-3-chloro-3-iodo-2-methylprop-1-en-1-ol
 
 
 
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