نتایج جستجو برای: feii complex
تعداد نتایج: 784208 فیلتر نتایج به سال:
The title compound, dipotassium diaqua-bis-(diphosphato)triferrate(II), K(2)[Fe(II) (3)(P(2)O(7))(2)(H(2)O)(2)], was synthesized under solvothermal conditions. The crystal structure is isotypic with its Co analogue. In the structure, there are two crystallographically distinct Fe positions; one lies on an inversion center, the other on a general position. The first Fe(2+) cation adopts a regula...
Iron-based layered double hydroxides (LDHs) obey to the general chemical formula [MII(1-x)MIIIx(OH)2]x+. [(x/n) An-, m H2O]xand contain a minimum of 50 % of iron, i.e. FeII or FeIII, in the cationic sheets. As LDHs contain FeII species, these are interesting minerals for several applications such as the reduction of anionic pollutants or the degradation of organic pollutants. They are mostly pr...
In com plexes o f the type [(NC )2H gIIN C FeII(CN )5]4~ which are formed in aqueous mixtures of H g(C N )2 and [Fe(C N )6]4~ both metals are weakly coupled. Optical metal to metal charge transfer (M M CT) excitation from F e11 to Hg" leads to the reduction of Hg" to Hg" an the oxidation of [Fe(C N )6]4~ to [Fe(C N )6]3~. In the complex [(NC)5CoIH g IIC o I(CN )5]6" the metals are strongly coup...
determination of uranium in natural water and complex solutions using ion exchange chromatography: a combined procedure using ion exchange chromatography and uv-vis spectrophotometry techniques has been developed to measure uranum in natural water and complex solutions. after conditicing , one hundred milli liters of sample solutions have been passed through an ion exchange column,pachked with ...
Although largely overlooked in peptide engineering, coordination chemistry offers a new set of interactions that opens unexplored design opportunities for developing complex molecular structures. In this context, we report artificial ligands fold into chiral helicates the presence labile metal ions such as FeII and CoII. Heterochiral ?-turn-promoting sequences encode stereoselective folding def...
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