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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: naruto-kun on May 23, 2013, 08:03:07 AM

Title: Complex reaction between Isoniazid and sodium nitroprusside
Post by: naruto-kun on May 23, 2013, 08:03:07 AM

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.

Title: Re: Complex reaction between Isoniazid and sodium nitroprusside
Post by: Hunter2 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⁺