706808-92-6

Upstream product

• 110-86-1 pyridine 
• 164528-03-4 [(2,3,7,8,12,13,17,18-octaethyl-5,10,15,20-tetraphenylporphyrinate)Fe(III)(C₆F₅)] 
• 17378-76-6 Fe(4,7-dimethyl-1,10-phenanthroline)3⁽³⁺⁾ 
• 99-50-3 3,4-Dihydroxybenzoic acid 
• 490-78-8 2,5-Dihydroxyacetophenone 
• 303-38-8 2,3-Dihydroxybenzoic acid 
• 13673-92-2 3,5-dichlorocatechol 
• 51-43-4 L-epinephrine 

Relevant academic research and scientific papers

Electron-transfer kinetics for generation of organoiron(IV) porphyrins and the iron(IV) porphyrin π radical cations

Homogeneous electron-transfer kinetics for the oxidation of seven different iron(III) porphyrins using three different oxidants were examined in deaerated acetonitrile, and the resulting data were evaluated in light of the Marcus theory of electron transfer to determine reorganization energies of the rate-determining oxidation of iron(III) to iron(IV). The investigated compounds are represented as (P)Fe(R), where P = the dianion of 2,3,7,8,12,13,17,18-octaethyl-5,10,15,20-tetraphenylporphyrin (OETPP) and R = C6H5, 3,5-C6F2H3, 2,4,6-C6F3H2, or C6F5 or P = the dianion of 2,3,7,8,12,13,17,18-octaethylporphyrin (OEP) and R = C6H5, 2,4,6-C6F3H2, or 2,3,5,6-C6F4H. The first one-electron transfer from (P)Fe(R) to [Ru(bpy)3]3+ (bpy = 2,2'-bipyridine) leads to an Fe(IV) σ-bonded complex, [(P)Fe(IV)(R)]+, and occurs at a rate which is much slower than the second one-electron transfer from [(P)Fe(IV)(R)]+ tO [Ru(bpy)3]3+ to give [(P)Fe(IV)(R)]·2+. The one- or two-electron oxidation of each (OETPP)Fe(R) or (OEP)Fe(R) derivative was also attained by using [Fe(phen)3]3+ (phen = 1,10-phenanthroline) or [Fe(4,7-Me2phen)3]3+ (Me2phen = 4,7-dimethyl- 1,10-phenanthroline) as an electron-transfer oxidant. The reorganization energies (kcal mol-1) for the metal-centered oxidation of (P)Fe(III)(R) to [CP)Fe(IV)(R)]+ increase in the order (OEP)Fe(R) (83 ± 4) 6F5) (99 ± 2) 6F3H2) (107 ± 2) 6F2H3) (109 ± 3) 6H5) (113 ± 3). Each value is significantly larger than the reorganization energies determined for the porphyrin-centered oxidations involving the same two series of compounds, i.e., the second electron transfer of (P)Fe(R). In each case, the first metal-centered oxidation is the rate-determining step for generation of the iron(IV) porphyrin π radical cation. Coordination of pyridine to (OETPP)Fe(C6F5) as a sixth axial ligand enhances significantly the rate of electron-transfer oxidation.

Electron Transfer between Benzenediols and Tris(1,10-phenanthroline)iron(III) in Micellar Systems

The effect of both cationic and anionic micelles on the reaction rates and mechanisms of electron transfer between benzenediols and 1,10-phenanthroline-like ligands complexes of iron(III) has been investigated.In the cationic micellar system, the reactions have been found to occur in water phase, the reaction rates being lower in respect to the homogeneous solution.On the other hand, in the presence of anionic micelles, the reactions occur in the micellar phase or at the interface between micellar and water phase.In this case the reaction rates are enhanced with theexception of the experiments performed with a benzenediol derivative bearing two sulphonic groups.The binding constants of the benzenediols with the two different surfactants have been estimated.