Iron, tetra

Shi C, Anson EC. 1990. Catalytic pathways for the electroreduction of oxygen by iron tetra-kis(4-iV-methylpyridyl)porphyrin or iron tetraphenylporphyrin adsorbed on edge plane pyrol3dic graphite electrodes. Inorg Chem 29 4298. 

Ci28Hii6Fi2FegN4PioS4, Iron, tetrakis- /i-cyano(T) -cyclopentadienyl)-(l,2-bis(diphenylphosphino)ethane)iron -tetra(/43-thio)tetra-, hexafluorophosphate, 34 164... 

Iron tetra(p-methylpyridinium)porphyrin (T(p-M)PyP) Iron tetrakis(3-sulfonatophenyl)porphyrin (TPPS)... 

Replacement of the olefinic ligand yields dibromomethyl iron tetra-carbonyl bromide. This type of reaction has been directly observed in the following system 282> ... 

WBF P yjH, Tungsten(lV), bis[l,2-ethane-diylbis(diphenylphosphine)](2-isocyano-2-methylpropane)[(methylamino)-methylidyne]-, irons-, tetra-fluoroboratef 1 —), 23 12 WBjF.NjP.Cj.H,., Tungsten(IV), bis(l,2-... 

Polyaromatics (anthracene and phenanthrene) have also been oxidized by FePcS/H202. This catalytic system is highly influenced by the presence of an organic co-solvent and phosphate ions. Iron tetra-amide complexes are also able to efficiently catalyze the oxidative cleavage of TCP with hydrogen peroxide at basic pH values. ... 

The effect of the gaseous atmosphere was studied by Tarasevich and Radyuskina who concluded that under N2, Ar, and He in the temperature range of 500-1,000 °C for different dwell times between 0.3 and 5.0 h, the activity and durability of the studied metalloporphyrins and metallo-phthalocyanines were similar [25]. This was a case for disagreement between different groups who observed dependence between the activity of heat-treated catalysts and the gas used during the heat treatment. For example, Dhar et al. showed the difference in the catalytic activity of heat-treated CoTAA under vacuum, N2, Ar, and N [26]. They concluded that the most active ORR catalyst was obtained under vacuum with the following decrease in activity vacuum > N2 > Ar > N (Fig. 8.2). Dodelet and his collaborators [27] showed that an iron tetra(methoxyphenyl) porphyrin is the most stable, but the least active when heat-treated in Ar, and that it becomes very active and loses its stability when treated in ammonia, an effect attributed to the concurrent increase in the microporous surface area, as well as the N and Fe surface content. The authors raised important questions about the catalyst design and optimum heat-treatment conditions for maximum stability and activity. 

A cheap and safe oxidant, extremely attractive for obvious economic and environmental reasons, is oxygen. Since sonication is able to activate gases (p. 63), reactions using molecular oxygen were logically attempted. This can be the case in the oxidation of cyclohexane to cyclohexanol in the presence of iodosobenzene and the homogeneous catalyst iron tetra(pentafluorophenyl)porphyrin.i o... 

There exist obvious cases where relativistic methods are mandatory such as reactions in which the educts and products feature electronic ground states of different spin. This implies that the spin symmetry is changed on the reaction path (mediated by spin-orbit coupling). Such events occur fairly often in transition metal chemistry (for an example see the recombination of carbon monoxide with iron tetra-carbonyl [1013,1014]), so often that even a new... 

Umasankar Y, Shie J-W, Chen S-M. Electrocatalytic activity of oxygen and hydrogen peroxide reduction at Poly(iron tetra(o-aminophenyl)porphyrin) coated multiwalled carbon nanotube composite film. J Electrochem Soc 2009 156 K238—44. 

LB multilayer thin films can also be formed from nickel-tetra-tert-butyl-phthalocyanine, iron-tetra-tert-butylphthalocyanine, and mixtures of these phthalocyanines with PHT. The phthalocyanine molecules serve as both a surface active agent to promote spreading and an electroactive material [424,425]. 

Bettelheim A, Kuwana T (1979) Rotating-iing-disk analysis of iron tetra(N-methylpyridyl) porphyrin in electrocatalysis of oxygen. Anal Chem 51(13) 2257-2260... 

Vdovenko, I.I. Guerus, and Y.L. Yagtpolskii, J. Organomet. Chem., 1986, 301, 195. Intramolecular cis-trans isomerisation of bis(perfluproalkyl)iron tetra-carbonyls. 

Luceao M, Ramirez G, Riquelme A, Azocar I, Isaacs M, Armijo F, Forster JE, Trollund E, Aguirre MJ, Lexa D (2004) Electrocatalytic oxidation of sulfite at polymeric iron tetra (4-aminophenyl) porphyrin—modified electrode. J Mol Catal A Chem 221 71-76... 

II Metathetic substitution with sodium salt of iron tetra-carbonyl. 

---