Manganese kinetics

Left side of Fig. 4 shows a ribbon model of the catalytic (C-) subunit of the mammalian cAMP-dependent protein kinase. This was the first protein kinase whose structure was determined [35]. Figure 4 includes also a ribbon model of the peptide substrate, and ATP (stick representation) with two manganese ions (CPK representation). All kinetic evidence is consistent with a preferred ordered mechanism of catalysis with ATP binding proceeding substrate binding. 

A single report concerning the kinetics of the oxidation of dimethyl sulphoxide by tervalent manganese has been published143. This reaction proceeds by one-electron transfer forming the sulphoxide radical cation which, in the presence of a monomer such as acrylonitrile, may be used to initiate polymerization. Equation (48) has been proposed to describe the reaction. 

Davies, S. and Morgan, J. J. (1989). Manganese (II) oxidation kinetics on metal oxide surfaces, /. Colloid... 

Hastings, D. and Emerson, S. (1986). Oxidation of manganese by spores of a marine Bacillus Kinetics and thermodynamic considerations. Geochem. Cosmochim. Acta 50,1819-1824. 

Morgan, J. J. (1967). Chemical equilibria and kinetic properties of manganese in natural waters. In "Principles and Applications of Water Chemistry" (S. D. Faust and J. V. Himter, eds), pp. 561-623. Wiley, New York. 

Kinetic 37, 50-52, 97, 168) and stereochemical 54, 191, 192) investigations on the carbonylation of manganese alkyls and the decarbonylation of manganese acyls were already discussed in Sections III-V. The original finding (50) that the rate of CO insertion follows second-order kinetics has now been qualified 192). At higher pressures of CO (>15 atm) the first-order rate law [Eq. (23)] is obeyed. 

In an earlier series of experiments, Cullis and Ladbury examined the kinetics of the permanganate oxidation of hydrocarbons in acetic acid solution. Initial attack on toluene occurs at the methyl group and a total order of two was found. Electron-withdrawing agents reduced the rate of oxidation. However, the effects of added salts were complex and the authors believe that lower oxidation states of manganese are responsible for the oxidation. The oxidation of ethylbenzene produced acetophenone, the process being second-order with... 

The permanganate oxidation of phenols is complicated by the intervention of lower oxidation states of manganese, (c/. the oxidation of toluene, p. 298). For example, the oxidation of 2,6-dinitrophenol in weakly acidic solution displays an induction period, following second-order kinetics thereafter. However, addition of potassium fluoride inhibits reaction almost completely, but manganous ions strongly accelerate it. 

Atkinson, G. Kor, S. K. (1965). The kinetics of ion association in manganese sulphate solutions. I. Results in water, dioxane-water mixtures, and methanol-water mixtures at 25 °C. Journal of Physical Chemistry, 69, 128-33. 

Kumar, R., Garces, L.J., Son, Y., Suib, S.L. and Malz, R.E. (2005) Manganese oxide octahedral molecular sieve catalysts for synthesis of 2-aminodiphenylamine. Journal of Catalysis, 236, 387-391. Opembe, N.N., Son, Y., Sriskandakumar, T. and Suib, S.L. (2008) Kinetics and mechanism of 9H-fluorene oxidation catalyzed by manganese oxide octahedral molecular sieves. ChemSusChem, 1, 182-185. 

Changes of Manganese Partitioning Among Solid-phase Components in Arid-zone Soils Pathways and Short- and Intermediate-term Kinetics... 

Figure 6.19. Distribution of Mn in solid-phase fractions in Israeli soils. Soils were incubated at the saturated paste regime (after Han and Banin, 1996. Reprinted from Soil Sci Soc Am J, 60, Han F.X., Banin A., Solid-phase manganese fractionation changes in saturated arid-zone soils Pathways and kinetics, p 1075, Copyright (1996), with permission from Soil Sci Soc Am)...

Backes C.A., McLaren R.G., Rate A.W., Swift R.S. Kinetics of cadmium and cobalt desoprtion from iron and manganese oxides. Soil Sci Soc Am J 1995 59 778-785. 

Han F.X., Banin A. Solid-phase manganese fractionation changes in saturated arid-zone soils Pathways and kinetics, Soil Sci Soc Am J 1996 60 1072-1080. 

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