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Naming organic compounds

Discussion in 'Pre-Medical - MD' started by NubianPrincess, Feb 4, 2002.

  1. NubianPrincess

    NubianPrincess Perpetually Bored 7+ Year Member

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    Aug 10, 2001
    The Dirty Dirty
    This stuff is so confusing! Any tricks or tips to naming alkanes and cycloalkanes? :confused:
     
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  3. wolferman

    wolferman Member? 10+ Year Member

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    Jan 17, 2002
    Idaho
    My only suggestion is to keep the common names separate from IUPAC names so you don't accidentally interchange them when constructing the name from it's constituents. Good luck!
     
  4. FLY

    FLY Senior Member 7+ Year Member

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    Oct 1, 2001
    Umd-College Park
    Naming Alkanes and Cycloalkanes are hard??? give me a break.. thats the easiest thing about OChem...
     
  5. Scooby Doo

    Scooby Doo IEatShavedPussyCats 10+ Year Member

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    City
    </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by FLY:
    <strong>Naming Alkanes and Cycloalkanes are hard??? give me a break.. thats the easiest thing about OChem...</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Yep. I would have to agree with this guy.

    If you are having problems with this...don't expect the rest of the semester to be fun

    <img border="0" alt="[Pity]" title="" src="graemlins/pity.gif" />
     
  6. KyGrlDr2B

    KyGrlDr2B 7+ Year Member

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    Oct 15, 2001
    KY
    This is definitely the easiest part. If you can't do this, you may not be able to do the rest because on many of my tests it would say: "so and so compound reacts with so and so" so you had to know how to draw it before you could even solve it.
     
  7. Mossjoh

    Mossjoh Mayo Clinic-PGY2 10+ Year Member

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    Jan 1, 2001
    Jacksonville, FL
    Okay, lets make this easy.
    First of all, find the longest chain of carbons. That will give you your root. Secondly, you need to see what groups are attached to that chain. Lets say we have a methyl group attached at the #2 carbon of a 5 carbon chain. Don't forget, the chain is numbered by having the attached groups occupy the lowest. If its on the 2nd carbon of a 5 carbon chain, it could be #2 or #4, we always go for the #2.
    So, this would be named 2-methylpentane
    IUPAC

    Lets say we have 3 methyl groups, 2 on the #2 carbon and 1 on the #4 carbon. This compound would be called 2,2,4 trimethylpentane.

    Of course, then we add in double and triple bonds. The ending of the main root name just changes. Say again we have a 5 carbon compound with a methyl group on #2, but a double bond between carbons 2 and 3.

    We would call this
    2-methyl,3-pentene

    Mossjoh
     
  8. jargon124

    jargon124 Senior Member 10+ Year Member

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    Oct 2, 2001
    I love Ochem! I actually thought it was a fun class. I am weird though. :)
     
  9. KrazyKid

    KrazyKid Junior Member 7+ Year Member

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    Jan 25, 2002
    Tampa
    Ok, listen things can seem a bit overwhelming at first...just try your best and work through them--talk to a friend or a t.a. may be able to help...WE'VE all BEEN THERE and thought well if we don't know this, we'll never do any good...anyway JUST GET THAT OUT OF YOUR MIND and relax---that's 80 pacent of the problem!
     
  10. NubianPrincess

    NubianPrincess Perpetually Bored 7+ Year Member

    12,640
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    Aug 10, 2001
    The Dirty Dirty
    Actually, im not in ochem...this is my retake of chemII and this school gives an intro to Ochem.
    But thanks for the encouragement :rolleyes:
    I understand the concepts, but im wondering if there are some type of tricks for remembering all of the secondaries, isos and normals. I keep getting it confused. Is it just memorization of what looks how?
     

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