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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: Humr on August 05, 2021, 01:05:28 PM

Title: DPPA
Post by: Humr on August 05, 2021, 01:05:28 PM

Hello. I would like to ask, if somebody knows how to determine quality of Diphenylphosphoryl azide. I have old bottle of it and i would like to know if its bad or not. My first idea is LC/MS, but i am not sure if its stable enough. Second idea is some reaction which runs very well with it.

Title: Re: DPPA
Post by: rolnor on August 05, 2021, 01:44:10 PM

Its normaly a stable reagent, I think NMR would be best, its not stable to protic conditions like MeOH, H2O etc. normaly used as mobile phase for LC-MS.