Manganese iron interaction

Manganese, iron, cobalt, and nickel vapors do not give arene complexes with haloarenes. Interactions with hexafluorobenzene have been reported, but the explosive products are unlikely to be complexes containing planar C8F8 rings. The Ni-C8F8 cocondensate is a source of... 

Investigations of the interaction of the divalent cations of magnesium, calcium, manganese, iron, nickel, copper and zinc with the diacid diamide hydrolysis products of both ICRF 159 and ICRF 192 showed that the metal-binding affinities were similar in all cases with the exception of zinc which was bound less avidly by the hydrolysis product of ICRF 159131). No cytotoxic mechanism for the zinc chelate of the hydrolysis product of ICRF 159 has been established. It is unlikely that the intracellular chelation of zinc is the primary mechanism of cytotoxicity as the hydrolysis product of ICRF 192 binds zinc most avidly. 

Myers C. R. and Nealson K. H. (1988) Microbial reduction of manganese oxides interactions with iron and sulfur. Geochim. Cosmochim. Acta 52, 2727-2732. 

Davis CD, Ney DM, Greger JL. 1990. Manganese, iron and lipid interactions in rats. J Nutr 120 507-513. 

Ions of transition metals (homogeneously or in some cases supported on polymers [5]) also effectively catalyze the autoxidation. Salts of cobalt, manganese, iron, copper, chromium, lead, and nickel are used as catalysts that allow the reactions to be carried out at lower temperatures, therefore increasing the selectivity of the oxidation (see, for example, [6]). However, it is more important that the catalyst itself may regulate the selectivity of the process, leading to the formation of a particular product. The studies of the mechanism of the transition metal salt involvement have shown their role to consist, in most cases, of enhancing the formation of free radicals in the interaction with the initial and intermediate species. 

Akimov and Chernyak [452] investigated and reported on the mechanism of the interaction between columbite and tantalite and sulfuric acid. The said interaction is presented as comprising two steps. The first step is related to the formation of iron and manganese sulfates and of tantalum and niobium hydroxides ... 

Analysis of the volumetric effects indicates that as a result of such mechanical activation, iron and manganese are concentrated in the extended part of the crystal, while tantalum and niobium are predominantly collected in the compressed part of the distorted crystal structure. It is interesting to note that this effect is more pronounced in the case of tantalite than it is for columbite, due to the higher rigidity of the former. Akimov and Chernyak [452] concluded that the effect of redistribution of the ions might cause the selective predominant dissolution of iron and manganese during the interaction with sulfuric acid and other acids. 

In the case of a mixture of hydrofluoric and sulfuric acids, the process is more complex. It can be noted that sulfuric acid most probably interacts mainly with iron and manganese, whereas hydrofluoric acid serves mostly in the dissolution of tantalum and niobium and their conversion into soluble fluoride complexes. Nevertheless, due to the high acidity of the solution, here too the formation of hexafluorotantalate and hexafluoroniobate complex ions, TaF6" and NbF6, is expected. Hence, it is noted that the acid dissolution of tantalum-and niobium-containing raw material leads to the formation of hexafluoro-acids — HTaF6 and HNbF6. 

Livorness J, Smith T (1982) The Role of Manganese in Photosynthesis. 48 1-44 Llinas M (1973) Metal-Polypeptide Interactions The Conformational State of Iron Proteins. 17 135-220... 

Reduced iron, potassium and pyrophoric manganese all ignite in the gas at ambient temperature. Magnesium filings bum vigorously when heated in the gas [1]. Slightly warm sodium ignites in contact with the gas, and interaction with calcium is explosive [2],... 

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