A5089412406- Free Radicals and Antioxidants
- Oxidative Organic Chemistry Reactions
- Inorganic and Organometallic Chemistry
- Catalysis and Oxidation Reactions
- Photochemistry and Electron Transfer Studies
- Radical Photochemical Reactions
- Chemical Thermodynamics and Molecular Structure
- Chemical Synthesis and Reactions
- Electrochemical Analysis and Applications
- Analytical Chemistry and Chromatography
- Thermal and Kinetic Analysis
- Photopolymerization techniques and applications
- Organic Chemistry Cycloaddition Reactions
- Advanced Polymer Synthesis and Characterization
- Chemical Reactions and Mechanisms
- Vanadium and Halogenation Chemistry
- Catalytic Processes in Materials Science
- Electron Spin Resonance Studies
- Chemical Reaction Mechanisms
- Advanced Chemical Physics Studies
- Various Chemistry Research Topics
- Water Quality Monitoring and Analysis
- Chemistry and Chemical Engineering
- bioluminescence and chemiluminescence research
- Crystallization and Solubility Studies
National Academy of Sciences of Ukraine
2010-2023
Vasyl' Stus Donetsk National University
2006-2021
Institute of Physical and Organic Chemistry
1979-1993
Russian Academy of Sciences
1970-1986
N-oxyl radicals of various structures were generated by oxidation corresponding N-hydroxy compounds with iodobenzene diacetate, [bis(trifluoroacetoxy)]iodobenzene, and ammonium cerium(IV) nitrate in acetonitrile. The decay rate follows first-order kinetics depends on the structure radicals, reaction conditions, nature solvent oxidant. values self-decay constants change within 1.4 × 10-4 s-1 for 3,4,5,6-tetraphenylphthalimide-N-oxyl radical to 10-2 1-benzotriazole-N-oxyl radical. It was shown...
Статтю присвячено пам’яті видатного українського вченого в галузі фізичної хімії, кінетики та каталізу, талановитого організатора науки, лауреата Державної премії України науки і техніки (1993, посмертно), імені Л.В. Писаржевського НАН (1969), директора Інституту геології геохімії горючих копалин (1982—1986), керівника Відділення фізико-хімії технології хімії ім. (1986—1991), доктора хімічних наук (1964), професора (1966), дійсного члена НТШ (1992, академіка (1973) Романа Володимировича...
The reaction of 5-hydroxymethylfurfural (5-HMF) with arenes in superacidic trifluoromethanesulfonic acid (triflic acid, TfOH) as the solvent at room temperature for 1–24 h gives rise to 5-arylmethylfurfurals (yields 17–91%) and 2-arylmethyl-5-(diarylmethyl)furans 10–37%). formation these two types products depends on nucleophilicity arene. same reactions under action acidic zeolites H-USY high pressure tubes 130 °C 1 result only 45–79%). 2,5-Diformylfuran (2,5-DFF) AlBr 3 leads...
Nitroxyl radicals are widely used in chemistry, materials sciences, and biology. Imide-N-oxyl subclass of unique nitroxyl that proved to be useful catalysts mediators selective oxidation CH-functionalization. An efficient metal-free method was developed for the generation imide-N-oxyl from N-hydroxyimides at room temperature by reaction with (diacetoxyiodo)benzene. The allows production high concentrations free provides resolution their EPR spectra exhibiting superhyperfine structure benzene...
A model for predicting the rate constants of hydrogen atom transfer (HAT) from α–C–H bond p-substituted benzyl alcohols to N-oxyl radicals was proposed. To quantify factors governing reactivity both and alcohols, multivariate regression analysis performed using various combinations parameters. The based on a 2D array 35 HAT reactions, which span 4 orders magnitude. proposed polyparameter equation approximates experimental reactions with high accuracy three independent parameters: Brown...
ABSTRACT The acenaphthene oxidation with molecular oxygen in the presence of N ‐hydroxyphthalimide (NHPI) has been investigated. It is shown that main product hydroperoxide. phthalimide‐ ‐oxyl (PINO) radical generated situ from its hydroxyimide parent, NHPI, by iodobenzenediacetate. rate constant H‐abstraction ( k H ) PINO determined spectroscopically acetonitrile. kinetic isotope effect and activation parameters have also measured. On basis results our studies available published literature...
Abstract A kinetic study of the initiated oxidation benzyl alcohol and cumene by molecular oxygen was performed. The rate more enhanced with N‐ hydroxyphthalimide (NHPI) in case than that alcohol. HOOH inhibits does not affect It shown termination chain reactions phthalimid‐ oxyl radicals (PINO • ) occur RОО proceeds HOO . scheme process an equation describing kinetics presence NHPI are proposed. Using PM7 method, thermodynamic characteristics elementary steps explaining obtained results...
Abstract The oxidation of vinyl compounds such as styrene, α ‐methylstyrene, methyl methacrylate, acrylonitrile with molecular oxygen in the presence N ‐hydroxyphthalimide have been studied. It was shown that is efficient initiation oxidative polymerization monomers. products monomer at 66 °C and 1 atm O 2 are corresponding polyperoxides low carbonyl compounds. IR‐ H NMR spectroscopy confirm alternating copolymer structure –O–O– bonds main chain. In monomers initiated mixtures...
The structure–reactivity relationship in the chain propagation step of radical oxidation styrenes substituted ring (ortho, meta and para) vinyl group (position α β), addition a peroxyl to double bond, was investigated. With PM3 quantum chemical methods electronic structure reactants, transition state (TS) enthalpy reaction (ΔHRadd) were calculated. A linear correlation between ionisation potentials energies HOMO observed. calculated bond lengths charges on atoms at centre TS comparison their...