Abstract
IN the quantitative study of a reaction proceeding by a radical mechanism, it is of prime importance to know accurately the rate of generation of radicals in the system. For this purpose, α,α-diphenyl-β-picrylhydrazyl has been used as a radical scavenger. This material is a free radical and has the structure (C6H5)2N.N.C6H2(NO2)3. It is stable itself but interacts with reactive radicals to give stable products; it has a strong purple colour and the rate of fading of this colour in solution has been used for measuring the rate of production of radicals in the solution1. Provided that the concentration of α,α-diphenyl-β-picrylhydrazyl is not very small, the calculated rate of production of radicals is independent of its concentration. This result suggests that the scavenger captures all the radicals which are produced.
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References
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BEVINGTON, J. Inefficiency of Diphenylpicrylhydrazyl as a Radical Scavenger. Nature 175, 477–478 (1955). https://doi.org/10.1038/175477b0
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DOI: https://doi.org/10.1038/175477b0
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