salicylates and phenoxy-radical

salicylates has been researched along with phenoxy-radical* in 2 studies

Other Studies

2 other study(ies) available for salicylates and phenoxy-radical

Article	Year
Polyfluorinated Pd(II)-3,5-di-tert-butylsalicylaldimenes complexes: synthesis, structure, spectroscopy, redox behaviors and catalytic activity. Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 2013, Apr-15, Volume: 107 A series of new polyfluorinated palladium(II) complexes (7-12) of N-polyfluorophenyl-3,5-di-tert-butylsalicylaldimines (1-6) have been synthesized. They were characterized by analytical, spectroscopic (UV/Vis, IR, (1)H NMR, and ESR), electrochemical methods and their chemical oxidation and hydrogenation catalytic activity were studied. The X-ray crystal structure analysis of bis[N-(3,5-di-tert-butylsalicylidene)-F5Ph]Pd(II) (12) revealed a slightly distorted square-planar trans-PdN2O2 geometry around the palladium center. The UV/Vis and EPR results indicate that chemical oxidation of 7-10 by Ce(IV) in CHCl3 generates relatively stable Pd(II)-phenoxyl radical complexes (g=2.0044-2.0062). The results of chemical and electrochemical oxidation of 1-12, as well as the catalytic activity of 7-10 complexes in the hydrogenation of PhNO2 were presented. Topics: Coordination Complexes; Crystallography, X-Ray; Electron Spin Resonance Spectroscopy; Halogenation; Magnetic Resonance Spectroscopy; Models, Molecular; Oxidation-Reduction; Palladium; Phenols; Salicylates; Spectrophotometry, Infrared	2013
Intramolecularly hydrogen-bonded versus copper(II) coordinated mono- and bis-phenoxyl radicals. Dalton transactions (Cambridge, England : 2003), 2004, Sep-07, Issue:17 Ligands bearing two salicylidene imine moieties substituted in ortho and para positions by tert-butyl groups have been electrochemically oxidized into mono- and bis-phenoxyl radicals. The process involves an intramolecular proton coupled to electron transfer and affords a radical in which the oxygen atom is hydrogen-bonded to a protonated ammonium or iminium group. A weak intramolecular dipolar interaction exists between the two phenoxyl moieties in the bis-radical species. The copper(II) complexes of these ligands have been characterized and electrochemically oxidized. The mono-phenoxyl radical species are X-band EPR silent. The bis-phenoxyl radical species exhibits a (S= 3/2) ground state: it arises from a ferromagnetic exchange coupling between the two spins of the radicals and that of the copper(II) when the spacer is rigid enough; a flexible spacer such as ethylidene induces decomplexation of at least one phenoxyl group. Metal coordination is more efficient than hydrogen-bonding to enhance the chemical stability of the mono-phenoxyl radicals. Topics: Biomimetic Materials; Cations, Divalent; Copper; Electrochemistry; Free Radicals; Hydrogen Bonding; Imines; Ligands; Organometallic Compounds; Oxidation-Reduction; Phenols; Salicylates	2004

Article

Year

Polyfluorinated Pd(II)-3,5-di-tert-butylsalicylaldimenes complexes: synthesis, structure, spectroscopy, redox behaviors and catalytic activity.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 2013, Apr-15, Volume: 107

A series of new polyfluorinated palladium(II) complexes (7-12) of N-polyfluorophenyl-3,5-di-tert-butylsalicylaldimines (1-6) have been synthesized. They were characterized by analytical, spectroscopic (UV/Vis, IR, (1)H NMR, and ESR), electrochemical methods and their chemical oxidation and hydrogenation catalytic activity were studied. The X-ray crystal structure analysis of bis[N-(3,5-di-tert-butylsalicylidene)-F5Ph]Pd(II) (12) revealed a slightly distorted square-planar trans-PdN2O2 geometry around the palladium center. The UV/Vis and EPR results indicate that chemical oxidation of 7-10 by Ce(IV) in CHCl3 generates relatively stable Pd(II)-phenoxyl radical complexes (g=2.0044-2.0062). The results of chemical and electrochemical oxidation of 1-12, as well as the catalytic activity of 7-10 complexes in the hydrogenation of PhNO2 were presented.

Topics: Coordination Complexes; Crystallography, X-Ray; Electron Spin Resonance Spectroscopy; Halogenation; Magnetic Resonance Spectroscopy; Models, Molecular; Oxidation-Reduction; Palladium; Phenols; Salicylates; Spectrophotometry, Infrared

2013

Intramolecularly hydrogen-bonded versus copper(II) coordinated mono- and bis-phenoxyl radicals.

Dalton transactions (Cambridge, England : 2003), 2004, Sep-07, Issue:17

Ligands bearing two salicylidene imine moieties substituted in ortho and para positions by tert-butyl groups have been electrochemically oxidized into mono- and bis-phenoxyl radicals. The process involves an intramolecular proton coupled to electron transfer and affords a radical in which the oxygen atom is hydrogen-bonded to a protonated ammonium or iminium group. A weak intramolecular dipolar interaction exists between the two phenoxyl moieties in the bis-radical species. The copper(II) complexes of these ligands have been characterized and electrochemically oxidized. The mono-phenoxyl radical species are X-band EPR silent. The bis-phenoxyl radical species exhibits a (S= 3/2) ground state: it arises from a ferromagnetic exchange coupling between the two spins of the radicals and that of the copper(II) when the spacer is rigid enough; a flexible spacer such as ethylidene induces decomplexation of at least one phenoxyl group. Metal coordination is more efficient than hydrogen-bonding to enhance the chemical stability of the mono-phenoxyl radicals.

Topics: Biomimetic Materials; Cations, Divalent; Copper; Electrochemistry; Free Radicals; Hydrogen Bonding; Imines; Ligands; Organometallic Compounds; Oxidation-Reduction; Phenols; Salicylates

2004