The Journal of Physical Chemistry

Kinetics, mechanism and thermodynamics of glyoxal-sulfur (IV) adduct formation

TM Olson, MR Hoffmann

Index: Olson Terese M.; Hoffmann, Michael R. Journal of Physical Chemistry, 1988 , vol. 92, # 2 p. 533 - 540

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Citation Number: 23

Abstract

The reversible addition of glyoxal (ethanedial) and S(IV) to form glyoxal monobisulfite (GMBS) was studied spectro- photometrically over the pH range of 0.7-3.3. Far from equilibrium, the rate of GMBS formation is given by d[GMBS]/dt (k1,a pa1 + kz.appaz)[CzH20~ 1 [S(IV)19 where [CZH~OZI = [(CH(OH)z)zI + [CH(OH)zCHOl + [CHOCHOI, [S(IV)l ... = [H28.SO2] + [HS03-] + [SO3'-], aI = [HS03-]/[S(IV)], and aZ = [S032-]/[S(IV)]. The apparent ...