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orgo question.... kaplan?!!?!?

Discussion in 'DAT Discussions' started by JustwantDDS, Aug 4, 2011.

  1. JustwantDDS

    JustwantDDS DrAMG
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    [​IMG]

    ummmm so it says u cant have a grignard with an alkyne but u can!!! it makes an acetylide!!!! right?????? at least thats what i got out of destroyer


    kaplan's oc btw- super off in terms of DAT format style questions...
    i think im going to stop doing their OC stuff :eek:
     
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  3. toothhornet88

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    Well the way I solve this is first recognize that Grignard reagents would never react with an ether so the first thing I would do is look for an ether. Since it cannot react with an ether it will react with Chloride...its intended reaction to make R-Mg-X the other substituents are reactive with Grignard
     
  4. AllahIsGreater

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    Just know the problem in the destroyer and you will be fine. Source: I took the DAT :)
     
  5. wired202808

    wired202808 Membership Revoked
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    it has to do with acidity, the answer is not alkyne because the H off the alkyne is acidic and would prevent the grignard formation, meanwhile the O-CH3 is the ONLY choice that has no acidic protons, hence it will not hinder Gringard.
     
  6. needzmoar

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    You can react an alkyne with a grignard, yes. It's just an acid/base reaction. However, you can not form a grignard in the presence of an acidic proton or a reactive functional group (e.g. carbonyls).

    As for this question, all of the other answers choices have acidic protons.
     
  7. JustwantDDS

    JustwantDDS DrAMG
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    ohhh FORMING grignard vs. reacting with grignard....

    sorry its kinda late.
    thanks guys!
     
  8. needzmoar

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    this place is infinitely better than yahoo answers...lol 3 responses all within 60 secs
     
  9. JustwantDDS

    JustwantDDS DrAMG
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    makes me kinda feel better that people are studying this late!
    well kinda lateish for me...130am butttttt i study better at night anyway
     
  10. toothhornet88

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    Same here! That's why some of my posts are like at 4:30am lol
     

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