REDOX COMPOUNDS

Reactions or compounds of exceptional hazard are those involving combinations of powerful oxidants and reducing agents, in the so-called redox reactions or redox compounds. Such systems are capable of very large energy release rates, the best known examples being the propellant pairs used in rocket technology. 

It decomposes rapidly at ambient temperature and ignites or explodes within 1 -2 h. See related boranes, polynitroalkyl compounds See other REDOX compounds... 

See other perchlorate salts of nitrogenous bases, redox compounds... 

See related AMMINECHROMIUM PEROXOCOMPLEXES See other REDOX COMPOUNDS... 

See other amminemetal oxosalts, redox compounds See related metal perchlorates, redox reactions... 

See related PERCHLORATE SALTS OF NITROGENOUS bases See other REDOX compounds... 

Hydrazinium chlorite [66326-45-2] h2nn+h3cio2- Levi, G. R., Gazz. Chim. Ital. [2], 1923, 53, 105-108 It is spontaneously flammable when dry. See other chlorite salts, redox compounds C1H5N204... 

See other REDOX COMPOUNDS See related METAL NITRATES... 

We close this section with a note on the influence of pH on reduction potentials. Many redox reactions are pH-dependent, which can be understood with reference to the simple model in Figure 13.4, in which a redox compound in its oxidized state has a pK,t for proton dissociation that is different from (i.e., lower than) the corresponding value for its reduced state the positive charge of Xox is higher than that of Xred, so it is more difficult for Xox to accept a proton (i.e., its pKa is lower). The °(pH) is now... 

Redox Compounds Formed by Oxidizing and Reducing Species... 

Redox compounds that contain both reducing and oxidizing groups in their molecules are, for example, tin (II) perchlorate, peroxyformic acid, ammonium dichromate, and the double salt potassium cyanide with potassium nitrite [43]. 

Electron mediators successfully used with oxidases include 2,6-dichlorophenolindophol, hexacyanoferrate-(III), tetrathiafulvalene, tetracyano-p-quinodimethane, various quinones and ferrocene derivatices. From Marcus theory it is evident that for long-range electron transfer the reorganization energies of the redox compound have to be low. Additionally, the redox potential of the mediator should be about 0 to 100 mV vs. standard calomel electrode (SCE) for a flavoprotein (formal potential of glucose oxidase is about -450 mV vs SCE) in order to attain rapid vectrial electron transfer from the active site of the enzyme to the oxidized form of the redox species. 

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