Iron ligand effects

Fe(gmi)3] in glycol-water and a range of other binary aqueous solvent mixtures. These results, along with further results for AV for base hydrolysis of [Fe(phen)3] " and of [Fe(bipy)3] " in alcohol-water mixtures, have permitted the construction of a scheme combiniim solvent and ligand effects on AF for base hydrolysis of a range of diimine-iron(II) complexes. ... 

An anionic ligand effect in iron porphyrin complex-catalyzed competitive epoxidations of cis- and frawi-stilbenes by BU4NHSO5 has been studied in detail . Oxidation of the thiophosphite to the thiophosphate in solid phase oligonucleotide synthesis using BU4NHSO5 was also reported. ... 

There still remains the question, which is unanswered by either the TT-bonding hypothesis or by the concept of metal polarizing power, as to why cobalt(III) and manganese(I) experience a cooperative ligand effect, whereas there is no evidence as yet for such an effect with chromium in various oxidation states [any Cr(III)—SCN compounds are purely kinetic in origin and thermodynamically unstable with respect to Cr(III)— NCS] with iron(II) or iron(III), cobalt(II), or nickel-(II), even though the stereochemistries of these last two elements may be drastically modified by ligational effects (see Tables XXIX and XXXI). 

Anionic ligand effect on the nature of epox-idizing intermediates in iron porphyrin complex-catalyzed epoxidation reactions. Inorg. Chem. 41, 3647-3652. 

Antony, J., M. Grodzicki, and A.X. Trautwein (1997). Local density functional study of oxo-iron(IV) porphyrin complexes and their one-electron oxidized derivatives. Axial ligand effects. J. Phys. Chem. A 101, 2692-2701. 

Excitation into the near-UV bands enhances the iron-ligand vibrations, and stretching modes due to the Fe-02 and Fe-O-Fe moities are observed (137, 138). Interestingly, the Fe-O-Fe symmetric stretch appears at 492 cm, a value somewhat lower than those observed for the metHrX complexes. When the experiment is conducted in D2O, the vibration upshifts by 4 cm (Fig. 15). This behavior has been attributed to the effect of hydrogen bonding to the Fe-O-Fe unit which is expected to weaken the Fe-O-Fe bonds and thus downshifts Vs(Fe-O-Fe) relative to the metHrX... 

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