How to get nitrile from carboxylic acid

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bohojekek
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How to get nitrile from carboxylic acid

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Attached below is the full textbook question. I do not know of any ways in which carboxylic acid is able to undergo condensation to form a nitrile. From my knowledge, carboxylic acid can only undergo condensation with alcohol to form ester or with amine to form amide. How would I answer part a and then find b.
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ChenBeier
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Re: How to get nitrile from carboxylic acid

Post by ChenBeier »

Benzoic acid + NH3 => Benzoic amid => - H2O => Benzo Nitril
Using PCl5 for elimination water.
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