Results 1 to 10 of about 1,088 (243)

DFT Investigation of Hydrogen Atom Abstraction from NHC-Boranes by Methyl, Ethyl and Cyanomethyl Radicals—Composition and Correlation Analysis of Kinetic Barriers [PDF]

open access: goldMolecules, 2020
Understanding the hydrogen atom abstraction (HAA) reactions of N-heterocyclic carbene (NHC)-boranes is essential for extending the practical applications of boron chemistry.
Hong-jie Qu   +4 more
openalex   +3 more sources

Hydrogen Atom Abstraction and Reduction Study of 21-Thiaporphyrin and 21,23-Dithiaporphyrin [PDF]

open access: goldMolecules
The metal-free porphyrins protonation has gained interest over five decades because its structure modification and hardly monoacid intermediate isolation.
Xiaorui Ren   +6 more
openalex   +3 more sources

Selective Hydrogen Atom Abstraction by Hydrogen Atoms in Photolysis and Radiolysis of Alkane Mixtures at 77 K [PDF]

open access: bronzeBulletin of the Chemical Society of Japan, 1976
Abstract A selective hydrogen atom abstraction reaction by H atoms, which are produced at 77K by radiolysis of alkane or photolysis of hydrogen halides, has been found in isobutane, 2,2,3,3-tetramethylbutane (TMB), and cyclopropane matrices as well as in the neopentane matrix. The selective hydrogen atom abstraction reaction is caused by
Tetsuo Miyazaki   +3 more
openalex   +3 more sources

KINETICS OF THE ABSTRACTION OF HYDROGEN ATOMS FROM HYDROGEN SULFIDE BY TRIFLUOROMETHYL RADICALS [PDF]

open access: bronzeCanadian Journal of Chemistry, 1966
Trifluoromethyl radicals generated from the photolysis of hexafluoroacetone abstract hydrogen atoms from hydrogen sulphide.[Formula: see text]The rate constant of this reaction measured by comparing the rate with that for the recombination of trifluoromethyl radicals (k = 2.3 × 1013 cc mole−1 s−1) is given by,[Formula: see text]
Neville L. Arthur, T. N. Bell
openalex   +3 more sources

A comparison of hydrogen abstraction reaction between allyl-type monomers with thioxanthone-based photoinitiators without amine synergists

open access: yesFrontiers in Chemistry, 2022
The photodriven radical-mediated [3 + 2] cyclization reaction was found to yield polymers efficiently without being hindered by degradative chain transfer.
Xiaotian Zhao   +7 more
doaj   +1 more source

Photoinduced Ring Opening of Methyl 1-Aryl-5-oxo-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazole-2-carboxylates in the Presence of Diaryl Disulfides

open access: yesMolbank, 2023
Among the methods used for the synthesis of functionalized heterocyclic compounds, photochemistry has gained immense popularity due to the reactivity of intermediates in photoinduced reactions.
Nejc Petek, Uroš Grošelj
doaj   +1 more source

Ab initio chemical kinetics of Isopropyl acetate oxidation with OH radicals

open access: yesGreen Chemistry Letters and Reviews, 2023
Global reactivity descriptors of isopropyl acetate (IPA) and thermo-kinetic aspects of its oxidation via OH radicals have been studied. Transition state theory (TST) was utilized to estimate the bimolecular rate constants.
Mohamed A. Abdel-Rahman   +3 more
doaj   +1 more source

Abstraction of atomic hydrogen by atomic deuterium from an amorphous hydrogenated silicon surface [PDF]

open access: yesThe Journal of Chemical Physics, 2002
We have studied the interactions of atomic deuterium with hydrogenated amorphous silicon (a-Si:H) surfaces using surface-sensitive infrared spectroscopy. We deconvoluted the effects of the abstraction reaction from insertion and etching reactions and determined the activation energy barrier for abstraction of H by D from a-Si:H surfaces.
Eray S. Aydil   +5 more
openaire   +2 more sources

Theoretical study of the addition and hydrogen abstraction reactions of the methyl radical with formaldehyde and hydroxymethylene [PDF]

open access: yesJournal of the Serbian Chemical Society, 2018
The mechanism, thermochemistry and kinetics of the addition and hydrogen-atom abstraction reactions of the methyl radical with formaldehyde and hydroxymethylene were investigated by ab initio calculations.
Nguyen Huu Tho, Nguyen Xuan Sang
doaj   +1 more source

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