Inorganic radicals, aqueous solution

Ross, A. B. and Neta, P. "Rate Constants for Reactions of Inorganic Radicals in Aqueous Solutions", NSRDS-NBS65, U. S. Government Printing Office, Washington, D.C., 1979. 

Abstract Inorganic polysulfide anions and the related radical anions S play an important role in the redox reactions of elemental sulfur and therefore also in the geobio chemical sulfur cycle. This chapter describes the preparation of the solid polysulfides with up to eight sulfur atoms and univalent cations, as well as their solid state structures, vibrational spectra and their behavior in aqueous and non-aqueous solutions. In addition, the highly colored and reactive radical anions S with n = 2, 3, and 6 are discussed, some of which exist in equilibrium with the corresponding diamagnetic dianions. 

Anbar, M. and Neta, P. (1967). A compilation of specific biomolecular rate constants for the reaction of hydrated electrons, hydrogen atoms and hydroxyl radicals with inorganic and organic compounds in aqueous solutions. Int. J. Appl. Radiat. Isot. 18, 493-497. 

D.M. Stanbury, Reduction potentials involving inorganic free radicals in aqueous solution, Adv. Inorg. Chem. 33 (1989) 69-138. 

A. J. Bard, R. Parsons and J. Jordan, Standard Potentials in Aqueous Solution, Dekker, New York, 1985. D. M. Stanbury, Reduction Potentials of Free Radicals, Advances Inorganic Chemistry, Academic, New York, 1989, Vol. 33, p. 69. 

In aqueous solution the electron transfer between (reducing) carbon-centered radicals or (oxidizing) hetero-atom-centered inorganic radicals and organic molecules often proceeds by covalent bond... 

Neta, P., R. E. Huie, and A. B. Ross, Rate Constants for Reactions of Inorganic Radicals in Aqueous Solution, . /. Phys. Chem. Ref. Data, 17, 1027-1228 (1988). 

Sulphur dioxide dissolves in aqueous solutions of inorganic salts frequently more readily than in pure water. With most salts, excluding sulphates, compounds appear to be formed in solution of the general type MX. SO 2, where M and X stand for univalent metal and negative radical, respectively.2 The solubility curve of sulphur dioxide in sulphuric acid of concentration ranging from 55 to 98-5 per cent, is interesting. A minimum occurs at 85-8 per cent, acid, and from that point the curve inclines sharply upwards for both increase or decrease of sulphuric acid concentration.3... 

When hydroxyl radical is reacting with inorganic species, electron transfer will occur after aqueous solutions are irradiated with high energy electrons. For example, halogen ions (X-) will react with hydroxyl radical as follows ... 

Nakatani K, DohnoC, Nakamura T, Saito I (1998)p-Cyano substituted benzophenoneasan excellent photophore for one-electron oxidation of DNA. Tetrahedron Lett 39 2779-2782 Nathan C (1992) Nitric oxide as a secretory product from mammalian cells. FASEBJ 6 3051-3064 Neta P, Eluie RE, Ross AB (1988) Rate constants for reactions of inorganic radicals in aqueous solution. J Phys Chem Ref Data 17 1027-1284... 

Neta P, Fluie RE, Ross AB (1988) Rate constants for reactions of inorganic radicals in aqueous solution. J Phys Chem Ref Data 17 1027-1284... 

Fenton Reaction The reaction between hydrogen peroxide and Feaq2 + in acidic and neutral aqueous solutions, known as the Fenton reaction, generates a reactive intermediate capable of oxidizing a large number of organic and inorganic species.101102 Numerous studies have been carried out in an effort to elucidate the nature of this intermediate, believed to be either a HO" radical or a ferryl(IV) species (Scheme 8.17) but no definite solution was provided for almost a century. 

Reduction Potentials Involving Inorganic Free Radicals in Aqueous Solution David M. Stanbury... 

This is probably the most important radical species in aqueous solution. Oxidative reactions of the hydroxyl radical, ( OH), with inorganic and organic compounds have been well documented [8]. Compilations of bimolecular (second-order) rate constants have been published [3,8]. The OH- can undergo several types of reactions with species in aqueous solution, including addition, hydrogen abstraction, and electron transfer. 

Reductive dechlorination also produces inorganic chloride ion, but glyoxylic acid [Eq. (63)] rather than formic acid. As with the halomethanes, peroxyl radical formation is an important intermediate. Oxygen is clearly important to achieving dechlorination in aqueous solution. 

REDUCTION POTENTIALS INVOLVING INORGANIC FREE RADICALS IN AQUEOUS SOLUTION... 

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