JustwantDDS

DrAMG
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Jan 2, 2010
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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:
 

toothhornet88

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Feb 6, 2010
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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:
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
 
Jan 15, 2011
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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:
Just know the problem in the destroyer and you will be fine. Source: I took the DAT :)
 
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wired202808

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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:
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.
 
Jul 7, 2011
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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:
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.
 

JustwantDDS

DrAMG
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Jan 2, 2010
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ohhh FORMING grignard vs. reacting with grignard....

sorry its kinda late.
thanks guys!
 

JustwantDDS

DrAMG
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Jan 2, 2010
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this place is infinitely better than yahoo answers...lol 3 responses all within 60 secs
makes me kinda feel better that people are studying this late!
well kinda lateish for me...130am butttttt i study better at night anyway
 
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