Iron 2 2+, reaction with ozone

Grosjean, D., E. L. Williams, II, E. Grosjean, J. M. Andino, and J. H. Seinfeld, Atmospheric Oxidation of Biogenic Hydrocarbons Reaction of Ozone with /J-Pinene, d-Limonene, and trans-Caryophyllene, Em iron. Sci. Techriol., 27, 2754-2758 (1993a). 

Jang, M., and R. M. Kamens, Newly Characterized Products and Composition of Secondary Aerosols from the Reaction of a-Pinene with Ozone, Atmos. Em-iron, 33, 459-474 (1999). 

In aqueous solution and without artificial ligands, aqua-Fe(I V) is formed in the reaction of Fe2+ with ozone [reaction (78)] (Logager et al. 1992 Jacobsen et al. 1997a,b), and under rather non-physiological conditions Fe(IV) and even higher oxidation states of iron have been generated and characterized by pulse radiolysis (Bielski 1991). 

Boutevin et al. [177-180] treated different types of wastes of polyolefins (more often low density polyethylene) with a mixture air/ozone. They focused their studies on the quantification of the formed oxygenated species based on colorimetric titration using stable radicals such as diphenylpicryl-hydrazyl. They investigated the influence of mineral compounds (iron oxide, for example) used as catalysts for oxidative reactions. The ozonized polymers have been used as binders for composites materials containing mineral materials (sand, stones, etc.). 

The effectiveness of the gas-solid mass transfer in a circulating fluidized bed (see Chapter 10) can be reflected by the contact efficiency, which is a measure of the extent to which the particles are exposed to the gas stream. As noted in Chapter 10, fine particles tend to form clusters, which yield contact resistance of the main gas stream with inner particles in the cluster. The contact efficiency was evaluated by using hot gas as a tracer [Dry et al., 1987] and using the ozone decomposition reaction with iron oxide catalyst as particles [Jiang etal., 1991], It was found that the contact efficiency decreases as the particle concentration in the bed increases. At lower gas velocities, the contact efficiency is lower as a result of lower turbulence levels, allowing a greater extent of aggregate formation. The contact efficiency increases with the gas velocity, but the rate of increase falls with the gas velocity. 

Kimura el al. (2007) reported the first reproducible production of mass-independent oxygen in iron and silicate smokes from gas-phase reactions (Fig. 4.8). It is possible to misinterpret these data as being associated with ozone, which is known to have a large mass-independent composition. Comparing kinetics of the rates of the two reaction channels competing for reaction with O-atoms O + O2 + M — O3 + M and O + H2 — OH + H, one finds a factor of twenty higher probability for a H2 sink compared to ozone formation. 

Treatment of 2,2,2-trifluoro-] -phenylethanone (6) and (trifluoromethyl)benzene (8) with ozone or ozonized air in chlorinated hydrocarbons, and in the presence of excess nitrogen dioxide and a catalytic amount of an iron(Hl) salt at - 10 to O C, leads to the respective nitro compounds 7 and 9 in good to excellent yields. The reaction is clean and rapid, and little or no hydrolysis of the trifluoromethyl moiety is observed during the nitration. ... 

An oxidizer. The liquid is a sensitive explosive. Explosive reaction with carbon disulfide (when ignited), methanol (when ignited), pentacarbonyl iron (at 50°C), phosphine + oxygen, sodium diphenylketyl, dichlorine oxide, fluorine, nitrogen trichloride, ozone, perchloryl fluoride (at 100-300°C), vinyl chloride. Reacts to form explosive products with dienes (e.g., 1,3-butadiene, cyclopentadiene, propadiene). 

Chiral electrophilic cyclopropanes (63) are prepared in high enantiomeric excess starting from butadiene-iron tricarbonyl complexes (60) containing a non-complexed double bond. Reaction with diazomethane and decomposition of the resulting pyrazolines (61) in the presence of Ce" gave the corresponding chiral cyclopropanes (62). Breakdown of the dienic substituent of electrophilic cyclopropane (62) by means of ozonization resulted in the formation of formyl-substituted electrophilic cyclopropane (63) still carrying the asymmetric centre (equation 10) " . ... 

Determination of ozone in air is based on its reaction with bis(terpyridyl)iron(Il) [24]. 

Fig. 8-12. Aqueous oxidation of S02 in clouds as a function of pH relative rates for reactions of dissolved S02 with ozone, H202, NOz, and oxygen, the latter catalyzed by manganese/iron, or solid carbon for the concentrations indicated. Calculations assume S02 scavenging efficiencies for a liquid water content L = 0.3 g/m3 (see Fig. 8-8), and mass transport limitations are neglected. This restriction probably exists for the reaction with H202.

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