Literature DB >> 21049943

The redox chemistry of sulfenic acids.

Alaina J McGrath1, Graham E Garrett, Luca Valgimigli, Derek A Pratt.   

Abstract

A persistent triptycenyl sulfenic acid is used as a model for cysteine-derived and other biologically relevant sulfenic acids in experiments which define their redox chemistry. EPR spectroscopy reveals that sulfinyl radicals are persistent and unreactive toward O(2), allowing the O-H bonding dissociation enthalpy (BDE) of the sulfenic acid to be readily determined by equilibration with TEMPO as 71.9 kcal/mol. The E° (RSO•/RSO(-)) and pK(a) of this sulfenic acid are also reported.

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Year:  2010        PMID： 21049943     DOI： 10.1021/ja1083046

Source DB:  PubMed          Journal:  J Am Chem Soc        ISSN： 0002-7863            Impact factor:   15.419


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