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Author: Subject: Nitriles - nucleophilic or electrophilic
GreenD
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[*] posted on 15-2-2013 at 15:40
Nitriles - nucleophilic or electrophilic


A friend made the claim that the Nitrogen of a nitrile would be nucleophilic, like the oxygen of a carboxylic acid group. And would thus be likely to have a weak hydrogen bond to water.

I thought this would not be the case, even though the large electron density.

Thoughts?




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kavu
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[*] posted on 15-2-2013 at 16:05


This page should settle your argument:

http://www.mhhe.com/physsci/chemistry/carey/student/olc/ch20reactionsnitriles.html

If you want a MO-approach then the nitrile HOMO (nucleophilic region) protrudes away from the triple bond at the nitrogen lone pair. Overlap of electrophiles is favoured at this end. Nitrile LUMO (electrophilic region) is bulged towards the carbon and this end will react with nucleophiles.

[Edited on 16-2-2013 by kavu]

[Edited on 16-2-2013 by kavu]




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GreenD
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[*] posted on 15-2-2013 at 16:09


PRetty clear, thanks.



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