September 26, 2021, 08:44:28 PM
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Topic: Complex reaction between Isoniazid and sodium nitroprusside  (Read 1912 times)

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Offline naruto-kun

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Please help me explain reaction between Isoniazid (isonicotinylhydrazine) and sodium nitroprusside Na2[Fe(CN)5NO] (freshly prepared equal volume: 3 drops mix of sodium nitroprusside and NaOH, addition 2 drops of dilute acetic acid) to give an intense orange colour which fades slowly. If you add 3 drops of HCl, red-orange colour will change to red-brown then yellow.
I've searched for many places on google still can't found anything yet. Thanks so much in advance.

Offline Hunter2

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Re: Complex reaction between Isoniazid and sodium nitroprusside
« Reply #1 on: May 24, 2013, 12:58:35 AM »
Hydrazin R-NHNH2 and Nitroxide NO will react each other. The colour is related to the Iron Fe3+

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