Iron chemistry

As in the case of iron chemistry, most valuable information concerning bond properties (anisotropic electron population of molecular orbitals) and local structure may be extracted from quadrupole-split Ru spectra. This has been... 

McKnight, D. M., and K. E. Bencala (1988), "Dial Variations in Iron Chemistry in an Acidic Stream in the Colorado Rocky Mountains", Arctic and Alpine Research 20, 492-500. 

MMO has been identified as a member of the binuclear octahedral iron family (Woodland et al., 1986 Fox et al., 1988). The enzyme can hydrox-ylate a wide variety of hydrocarbons, including some toxic waste compounds hence, the enzyme has elicited considerable interest beyond its contribution to binuclear iron chemistry and mechanisms of oxygen activation. Although we do not have a crystal structure and have only limited spectroscopic data, the properties of the enzyme indicate that it should be considered with the other oxygen-activating binuclear iron proteins. 

It is clear that a great deal of research is needed to elucidate the polynuclear iron chemistry of model systems containing sulfur in order to understand the unique biochemical properties of these molecules. 

The strong coupling between sulfur and iron chemistry becomes obvious in this example. Conservation of alkalinity within the system is achieved only if the sulfide formed is prevented from reoxidation, a process that would restore the acidity. Prevention of reoxidation occurs through the ultimate storage of sulfide in sediments, either as organic sulfur or as iron sulfides (12, 13). The overall reaction of pyrite formation proceeds via formation of FeS ... 

No COT analogues of 64 or 65 are known in iron chemistry, but the photochemical reaction of [Os3(CO)12] with COT has been reported to yield the osmium(II) complex 66, which rearranges to the thermodynamically stable... 

Anderson, M.A. and Morel, F.M.M., 1982. The influence of aqueous iron chemistry on the uptake of iron by the coastal diatom Thalassiosira weissflogii. Limnoi. Oceanogr., 27 789-813... 

Rue, E. L., and K. W. Bruland. 1997. The role of organic complexation on ambient iron chemistry in the equatorial Pacific Ocean and the response of a mesoscale iron addition experiment. Limnology and Oceanography 42 901—910. 

O2 (bars) If the atmospheric concentration of oxygen is known, then specify here. Otherwise, enter 0.0. If you are interested in ferrous iron chemistry, then you may want to assign O2 a value of 0.0. Otherwise, it is likely that the insolubility of ferric minerals in the presence of O2 will cause all the iron to precipitate as a ferric mineral [see discussions in Marion et al. (2003a) iron paper]. 

Marion GM, Catling DC, Kargel JS (2003a) Modeling aqueous ferrous iron chemistry at low temperatures with application to Mars. Geochim Cosmochim Acta 67 4251-4266... 

A notable feature of the literature concerned with iron chemistry is that while a number of excellent reviews are available that deal with specific topics, there are none that deal with the whole coordination chemistry of iron(ll). The present review first deals with cyanide complexes followed by complexes containing simple monodentate nitrogen donors. The huge amount of work published... 

Brandtberg, P. O. Simonsson, M. (2003). Aluminum and iron chemistry in the O horizon changed by a shift in tree species composition. Biogeochemistry, 63, 207-28. 

This type of sandwich complex, first reported with iron as the central metal, has now become widespread with ruthenium as well. Early routes to ruthenium complexes were modeled on iron chemistry, and used the AICI3-catalyzed exchange of a cyclopentadienyl ligand for an arene in ruthenocene, or reaction of CpRu(CO)2Cl with AlCb/arene. These methods are less successful with ruthenium than with iron, however, owing to the greater stability of ruthenocene. A mixture of arene, pentamethylcyclopentadiene, and RuCls in the Zn reduction method gives good yields of the mixed-sandwich cations. A... 

Current evidence indicates that hypervalent iron complexes—ferryl iron (FelV, Fe02, Fe(IV)=0) or perferryl iron (FeV)—are involved in the catalytic mechanism, but there is stiU controversy over the details of reaction mechanisms and what proportion of heme catalysis it accounts for. Very recently, some very elegant chemistry has elucidated binding and 0—0 bond scission mechanisms and identified heme structural elements critical for oxidation catalysis (143, 144). Paradoxically, although the early theories of heme catalysis have been largely dismissed, they nevertheless are consistent with aspects of hypervalent iron behavior. Ferryl iron chemistry encompasses and explains the most important features noted in early studies (99) ... 

Anderson, M. A., and Morel, F. M. M. (1982) The Influence of Aqueous Iron Chemistry on the Uptake of Iron by the Coastal Diatom Thalassiosira weissfioggi, Limnol. Oceanogr. 27, 789-813. 

---