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Topic: Nitriles  (Read 4518 times)

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Offline Aznhmonglor

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Nitriles
« on: April 23, 2009, 05:04:20 PM »


I have a problem on this question. I know that one of the products, Product B, is an R-OH group. I got that part correct it was just methanol. Now for the major organic product A, I tried



and it wasn't right. What did I do wrong? Is there suppose to only be one nitrogen in the product??

Offline azmanam

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Re: Nitriles
« Reply #1 on: April 23, 2009, 05:05:45 PM »
how did you extrude methanol as the byproduct?  what was your mechanistic thought process for making the amide you proposed for A?
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Offline Aznhmonglor

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Re: Nitriles
« Reply #2 on: April 23, 2009, 05:11:45 PM »
I know that an ester combined with NH3 would form an acetamide and an ROH group. My thought process was that if there is an NH2 group than that means that an NH3 could have replaced the oxygen with the methyl to form the ROH and the NH2 would take place. Wrong?

Offline azmanam

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Re: Nitriles
« Reply #3 on: April 23, 2009, 05:14:27 PM »
Quote
would form an acetamide

first, acetamides are a particular functional group (http://en.wikipedia.org/wiki/Acetamide)

Quote
that means that an NH3 could have replaced the oxygen with the methyl to form the ROH

ok thought process... but you have to use the reagents given.  You weren't given NH3.  What else can you use as a nucleophile?
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Offline Aznhmonglor

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Re: Nitriles
« Reply #4 on: April 23, 2009, 05:15:36 PM »
Ah HAH! the nitrogen group can be used as nucleophile? in which it attacks the carbonyl carbon?

Offline azmanam

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Re: Nitriles
« Reply #5 on: April 23, 2009, 05:15:56 PM »
yup
Knowing why you got a question wrong is better than knowing that you got a question right.

Offline Aznhmonglor

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Re: Nitriles
« Reply #6 on: April 23, 2009, 05:19:38 PM »
It must form this then!




right???

Offline azmanam

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Re: Nitriles
« Reply #7 on: April 23, 2009, 05:21:33 PM »
yup
Knowing why you got a question wrong is better than knowing that you got a question right.

Offline Aznhmonglor

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Re: Nitriles
« Reply #8 on: April 23, 2009, 05:24:14 PM »
Thank you so much. Its so much easier when I come on here. I kind of have an idea of whats going on but the material is new to me so I have to get it straight first on here. Thanks again Azmanam.

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