47836-89-5Relevant academic research and scientific papers
Aqueous solutions of hypovalent gallium; reductions using gallium(I)
Swavey,Gould
, p. 2159 - 2160 (2007/10/03)
Solutions 0.2 mol dm-3 in Ga1, prepared by dissolving Ga2Cl4 in dry acetonitrile, are stable for more than seven days and may be diluted 300- to 1000-fold with O2-free water to give Ga(I) preparations
Kinetics and mechanism of hydroxylamine oxidation by [Fe2III(μ-O)(phen)4(H2O)2]4+ in aqueous media
Chaudhuri,Banerjee
, p. 350 - 355 (2007/10/03)
Equilibrium studies show that in aqueous solutions containing excess 1,10-phenanthroline (phen) in the range pH 3-9, the complex ion [Fe2III(μ-O)(phen)4(H2O)2]4+ (1) undergoes rapid but par
Mechanism and Mathematical Model of the Oscillating Bromate-Ferroin-Bromomalonic Acid Reaction
Rovinsky, A. B.,Zhabotinsky, A. M.
, p. 6081 - 6084 (2007/10/02)
A mechanism for the oscillatory reaction of the ferroin-catalyzed bromomalonic acid oxidation by bromate is proposed.The mechanism involves eleven steps.The corresponding mathematical model is reduced to a second-order system of differential equations.The model obtained is in good agreement with experiment.
Solvent and ion-pairing effects on the photochemical arene replacement reactions of [(η5-C5H5)Fe(η6-p-xyl)] + (p-xyl = p-xylene). Evidence for a medium-assisted photochemical ligand replacement pathway from a LF excited state
Schrenk, Janet L.,Palazzotto, Michael C.,Mann, Kent R.
, p. 4047 - 4049 (2008/10/08)
The photochemical removal of p-xylene from [η5-C5H5)Fe(η6-p-xyl)] + (p-xyl = p-xylene) has been studied as a function of solvent (propylene carbonate, CH3OH, CH3CN, CH2Cl2) and as a function of the anion present (CF3SO3-, BF4-, Br-, ClO4-, PF6-, AsF6-, SbF6-) in CH2Cl2 solution. The quantum yield for p-xylene release varies from a high of 0.81 in water to a low of 0.084 in dichloromethane. The variation in quantum yield is indicative of solvent or anion assistance in the chemical step in which p-xylene is released from Fe. This interpretation of the quantum yield data establishes the relative nucleophilicity of the solvents and anions studied: H2O ≈ propylene carbonate ≈ CH3OH ≥ CH3CN > CF3SO3- > BF4- > Br- = ClO4- >> PF6- > CH2Cl2 ≈ AsF6- ≈ SbF6-. The medium assistance observed in these arene replacement reactions contrasts the dissociative behavior observed for LF excited states in other organometallic transition-metal systems.
Electron Transfer from Tetrakis(isocyanide)rhodium(I) Monomers, and the Oligomers to Iron(III) and Cobalt(III) Complexes. Enhancement of the Reactivity by the Oligomerization
Fukuzumi, Shunichi,Nishizawa, Nobuaki,Tanaka, Toshio
, p. 3482 - 3490 (2007/10/02)
Electron transfer reactions from tetrakis(isocyanid)rhodium(I) (+ to iron(III) complexes of the 3+ type (N-N = 1,10-phenanthroline, 2,2'-bipyridine) proceed through precursor complexes formed between + and 3+ with 1:1, 1:2, and 2:1 stoichiometry..A similar scheme is suggested for the reaction of bis(isocyanide)bis(triphenylphosphine)rhodium(I) with the same oxidants.The intramolecular electron transfer rate constants k1 in the 1:1 precursor complexes have been determined in MeCN at 298 K.In accordance with Marcus theory, the log k1 values are linearly related with the reduction potentials of oxidants with the theoretical slope of 8.5.The + cations form oligomers in MeCN; +>n (n = 2,3), and the equilibrium constants for oligomerization have been determined.For a given oxidant 3+ (bpy = 2,2'-bipyridine), the log k1 value of +>n increases in parallel with the HOMO energy of +>n; monomer less than dimer less than trimer.
Cyclic Voltammetry of Rh(I) Complexes and the Oligomers. A Correlation between the Anodic Peak Potentials and the Rate Constants for the Electron Transfer Reactions with Inorganic Oxidants
Fukuzumi, Shunichi,Nishizawa, Nobuaki,Tanaka, Toshio
, p. 2892 - 2897 (2007/10/02)
The cyclic voltammogram of a CH3CN solution of + exhibits three anodic current peaks which correspond to the oxidations of the monomer, the dimer, and the trimer, with no cathodic wave on the reverse scan.The anodic peak potentials Epox in such irreversible cyclic voltammograms were determined for various Rh(I) monomers and the oligomers such as +, 2+, 2+, 2+, 3+, and 4+ (R=p-MeOC6H4 and Ph, etc; dppm=bis(diphenylphosphino)methane, dicp=1,3-diisocyanopropane).The anodic peak potentials Epox vary mainly with the degree of oligomerization of the Rh(I) complexes, decreasing in the order monomer > dimer > trimer > tetramer, in parallel with the energies of the highest occupied molecular orbitals EHOMO.It has been found that the Epox values are linearly correlated with logarithm of the rate constants for the electron transfer reactions with inorganic oxidants such as 3+ and 3+ (bpy=2,2'-bipyridine) in the context of the Marcus theory as expected when the standard oxidation potentials E0ox would be used.It is thus suggested that the anodic peak potentials of the Rh(I) complexes in the irreversible system can be used as the standard oxidation potentials as far as the relative values are concerned.
Electron Transfer between Benzenediols and Tris(1,10-phenanthroline)iron(III) in Micellar Systems
Pelizzetti, Ezio,Pramauro, Edmondo,Croce, Daniele
, p. 265 - 270 (2007/10/02)
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.
