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Rate Constants for Reactions of Inorganic Radicals in Aqueous Solution

P. Neta and Robert E. Huie
Chemical Kinetics Division, National Bureau of Standards, Gaithersburg, MD 20899
and
Alberta B. Ross
Radiation Chemistry Data Center, Radiation Laboratory, University of Notre Dame, Notre Dame, IN 46556

J. Phys. Chem. Ref. Data 17: 1027-1284 (1988)


Rate constants have been compiled for reactions of various inorganic radicals produced by radiolysis or photolysis, as well as by other chemical means, in aqueous solutions. Data are included for the reactions of ·CO2–, CO3·–, O3, ·N3, ·NH2, ·NO2, NO3·, ·PO32–, PO4·2–, SO2·–, ·SO3–, SO4·–, SO5·–, SeO3·–, (SCN)2·–, Cl2·–, Br2·–, I2·–, ClO2·, BrO2·, and miscellaneous related radicals, with inorganic and organic compounds.

Arrangement of Data:


These data have not been arranged for browsing, but may be searched by the name of either of the reactants. In the case of metal ions whose the structure may not be known due to hydrolysis or coordination of anions from the solution, the metal species have been indicated only by their oxidation number (Stock number), e.g. Ce(IV). Water molecules coordinated to metal ions have generally been omitted, e.g. Cr2+ is listed not Cr(H2O)62+.

The products of the reactions are included when they are known reasonably well or when they have been discussed in the paper reporting the data. In some cases, where representation of the product by a formula was difficult but the type of reaction was known, the reaction type has been included in lieu of products, e.g. redn., e.t., or addn., for reduction, electron transfer, or addition, respectively. In some cases the representation of the product indicates the part of the substrate molecule on which reaction occurs.

When observed rate data over a pH range were used to calculate k for an individual ionic form, that is noted in the comments. In most cases the rate constant listed is kobs at the quoted pH. In some cases the observed k may be for a mixture of ionic forms of the substrate. Ionic strength corrections have only been given when reported by the authors, except in the case of SO2–. The rate data are assumed to be at ambient temperature unless otherwise noted in the comments.

The method of generation of the radical is given by symbols such as p.r. (pulse radiolysis), and f.p. (flash photolysis), identified in the list of abbreviations and symbols and other details about the determination and the system are given in the comment. Temperature and pressure are assumed to be ambient, otherwise the conditions have been noted.

Abbreviations and Symbols.


Introduction to Reactions of Inorganic Radicals.

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