Can someone tell me what this is?

Discussion in 'Chemistry' started by LittleBlackDress, Oct 11, 2007.

  1. Sciencelovah Registered Senior Member

    Messages:
    4,349
    Also, in refers to chem formula in the OP:

    (CH3)2C=C(CH3)OH

    which is C5H10O, these may refer to:
    • Cyclopentanol
    • Methyl isopropyl ketone
    • Pentanal
    • 2-Pentanone
    • 3-Pentanone
    • Prenol = 3-methyl-2-buthenol
    • Tetrahydropyran

    http://en.wikipedia.org/wiki/C5H10O

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  3. Sciencelovah Registered Senior Member

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    Exactly

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  5. LittleBlackDress Registered Member

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    5
    Thanks! So it definitely is an alkene, I knew that. 3-methyl-2-buthenol ... thanks again... It definitely seems right.
     
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  7. James R Just this guy, you know? Staff Member

    Messages:
    30,366
    It has a double bond, so it is definitely an alkene.
     
  8. Sciencelovah Registered Senior Member

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    4,349
    yes yes and it is represented by the e in buthenol.
     
  9. Nasor Valued Senior Member

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    6,221
    No one has pointed this out yet, but the molecule that you have asked about is very unlikely to exist. It’s an enol, which are not stable. Any time you have an alcohol OH group next to an alkene double bond it will usually rearrange to make a ketone.

    And no, contrary to what some people here have said, it is not prenol. The molecule that you describe has a methyl group and a hydroxyl group both attatched to a double-bonded carbon. Prenol (3-methyl-2-buthenol) has a different strucure.
     
    Last edited: Oct 12, 2007
  10. Nasor Valued Senior Member

    Messages:
    6,221
    What LittleBlackDress asked about:

    CH3.........CH3
    ...... \ .... /
    ....... C=C
    ...... / .... \
    CH3 ....... OH



    Prenol:

    CH3 ...... CH2-OH
    ...... \ .... /
    ...... C=CH
    ...... /
    CH3
     
  11. Enmos Staff Member

    Messages:
    43,184
    Hmm ok.
    Do you know the structure and the name ?
     
  12. andbna Registered Senior Member

    Messages:
    316
    Unless I'm mistaken, the names of Nasor's posted chemicals are:
    3-methyl-2-buten-2-ol
    and
    3-methyl-2-buten-1-ol (ie Prenol)
    respectivly

    -Andrew
     
  13. Sciencelovah Registered Senior Member

    Messages:
    4,349
    Actually I did already answer like this in post #8 and #10:


    but then I did not know the name for the first one (which littleblackdress
    actually asked). It reminds me to a geometric isomer, only that one methyl
    is replaced by -OH. I answer like that, but after around an hour I deleted the
    post. The thing is, when I googling in wikipedia on C5H10O, the chemical
    under the question does not exist. The closest one is prenol, so I thought
    littleblackdress made a slight mistake in putting the bracket,
    instead of (CH3)2C=CHCH2OH

    (s)he wrote: (CH3)2C=C(CH3)OH


    I believe thats the name. :bravo:
     
  14. Nasor Valued Senior Member

    Messages:
    6,221
    I don't think it could exist. Most enols are unstable.
     
  15. LittleBlackDress Registered Member

    Messages:
    5
    Nazor is right. It was prenol. That is correct. My notation was incorrect. inzomnia's molecule is, I believe, correct.

    CH3 ...... CH2-OH
    ...... \ .... /
    ...... C=CH
    ...... /
    CH3

    p.s. Maybe a blonde moment? I'm not a blonde though.. hmmm...
     

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