scholarly journals Absolute Rate Constants for Hydrogen Abstraction from Some Aromatic Hydrocarbons byp-Chlorophenylthiyl Radical

1977 ◽  
Vol 50 (1) ◽  
pp. 317-318 ◽  
Author(s):  
Tokuji Miyashita ◽  
Masashi Iino ◽  
Minoru Matsuda
Keyword(s):  
Aromatic Hydrocarbons ◽  
Rate Constants ◽  
Hydrogen Abstraction ◽  
Absolute Rate

Reaction kinetics of hydrogen abstraction from polycyclic aromatic hydrocarbons by H atoms

2017 ◽  
Vol 19 (45) ◽  
pp. 30772-30780 ◽  
Author(s):  
Dingyu Hou ◽  
Xiaoqing You
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Reaction Kinetics ◽  
Aromatic Hydrocarbons ◽  
Rate Constants ◽  
Hydrogen Abstraction ◽  
Polycyclic Aromatic ◽  
Kinetics Of

We studied how the PAH structure, site, and size affect the rate constants of hydrogen abstraction reactions of PAH systematically.

Absolute rate constants for hydrocarbon oxidation. XII. Rate constants for secondary peroxy radicals

1968 ◽  
Vol 46 (16) ◽  
pp. 2661-2666 ◽  
Author(s):  
J. A. Howard ◽  
K. U. Ingold
Keyword(s):  
Rate Constants ◽  
Hydrogen Abstraction ◽  
Peroxy Radical ◽  
Hydrocarbon Oxidation ◽  
Peroxy Radicals ◽  
Absolute Rate ◽  
Lower Reactivity ◽  
Inductive Effects ◽  
Steric Factors

Rate constants have been measured for hydrogen abstraction from four aralkanes and addition to two aralkenes by five secondary and one primary peroxy radical. These rate constants appear to show a slight dependence on the structure of the attacking peroxy radicals which may be due to the inductive effects of the substituents on the radical. The secondary and primary peroxy radicals are generally about 2–4 times more reactive than tertiary peroxy radicals in abstraction and 4–8 times more reactive in addition. The lower reactivity of tertiary peroxy radicals is probably due to steric factors.

Absolute rate constants for hydrocarbon oxidation. VIII. The reactions of cumylperoxy radicals

1968 ◽  
Vol 46 (6) ◽  
pp. 1017-1022 ◽  
Author(s):  
J. A. Howard ◽  
K. U. Ingold ◽  
M. Symonds
Keyword(s):  
Rate Constants ◽  
Isotope Effects ◽  
Hydrogen Abstraction ◽  
Cumene Hydroperoxide ◽  
Hydrogen Atom Abstraction ◽  
Hydrocarbon Oxidation ◽  
Peroxy Radicals ◽  
Absolute Rate ◽  
Substituent Constants ◽  
Deuterium Isotope Effects

Absolute rate constants have been measured for the reactions of cumylperoxy radicals with a number of hydrocarbons. The cumylperoxy radicals were produced from cumene hydroperoxide. Sufficient hydroperoxide was present to ensure that only cumylperoxy radicals were involved in the rate-determining propagation reaction.Primary and secondary deuterium isotope effects have been measured for propagation and termination in the oxidation of cumene. The rate of hydrogen atom abstraction from ring-substituted cumenes by cumylperoxy radicals can be correlated by the Hammett equation using σ+ substituent constants, ρ = −0.29. Primary and secondary peroxy radicals are about 3–5 times more reactive in hydrogen abstraction than tertiary peroxy radicals.

Rates of OH Radical Reactions. I. Reactions with H2, CH4, C2H6, and C3H8 at 295 K

1975 ◽  
Vol 53 (22) ◽  
pp. 3374-3382 ◽  
Author(s):  
R. P. Overend ◽  
G. Paraskevopoulos ◽  
R. J. Cvetanović
Keyword(s):  
Gas Phase ◽  
Rate Constants ◽  
Flash Photolysis ◽  
Hydrogen Abstraction ◽  
Resonance Absorption ◽  
Oh Radicals ◽  
Oh Radical ◽  
Absolute Rate ◽  
Absorption Spectrophotometry ◽  
Secondary Reactions

A fast flash photolysis kinetic spectrophotometer capable of measuring rates of up to 105 s−1 is described. The rates of hydrogen abstraction from H2, CH4, C2H6, and C3H8 by OH radicals at 295 ± 2 K, have been measured in the gas phase by hydroxyl resonance absorption spectrophotometry. The influence of secondary reactions on the measured rates and the derivation of the absolute rate constants is discussed in detail.The absolute rate constants in units of cm3 mol−1 s−1 were found to be: [Formula: see text][Formula: see text][Formula: see text] and [Formula: see text]

Sign in / Sign up

Export Citation Format

Share Document