Rate constants for the gas-phase reactions of Cl atoms with a series of hydrofluorocarbons and hydrochlorofluorocarbons at 298 ± 2 K

1992 ◽  
Vol 24 (7) ◽  
pp. 639-648 ◽  
Author(s):  
Ernesto C. Tuazon ◽  
Roger Atkinson ◽  
Stephanie B. Corchnoy
Keyword(s):  
Gas Phase ◽  
Rate Constants ◽  
Gas Phase Reactions ◽  
Cl Atoms

Rate constants for the gas-phase reactions of OH radicals and Cl atoms with CH3CH2NO2, CH3CH2CH2NO2, CH3CH2CH2CH2NO2, and CH3CH2CH2CH2CH2NO2

1989 ◽  
Vol 156 (4) ◽  
pp. 312-318 ◽  
Author(s):  
Ole J. Nielsen ◽  
Howard W. Sidebottom ◽  
Denis J. O'Farrell ◽  
Michael Donlon ◽  
Jack Treacy
Keyword(s):  
Gas Phase ◽  
Rate Constants ◽  
Oh Radicals ◽  
Gas Phase Reactions ◽  
Cl Atoms

Gas-phase reactions of Cl atoms with hydrochloroethers: relative rate constants and their correlation with substituents' electronegativities

2008 ◽  
Vol 21 (5) ◽  
pp. 393-396 ◽  
Author(s):  
Pablo R. Dalmasso ◽  
Raúl A. Taccone ◽  
Jorge D. Nieto ◽  
Pablo M. Cometto ◽  
Silvia I. Lane
Keyword(s):  
Gas Phase ◽  
Rate Constants ◽  
Relative Rate ◽  
Gas Phase Reactions ◽  
Relative Rate Constants ◽  
Cl Atoms

Methylene. III. Gas phase reactions with 1-chloropropane

1969 ◽  
Vol 312 (1509) ◽  
pp. 141-161 ◽  
Keyword(s):  
Gas Phase ◽  
Rate Constants ◽  
Hydrogen Abstraction ◽  
The Other ◽  
Gas Phase Reactions ◽  
Other Hand ◽  
Chlorine Substituent ◽  
High Degree ◽  
Singlet Methylene

The work described in this and the following paper is a continuation of that in parts I and II, devoted to elucidation of the mechanism of the reactions of methylene with chloroalkanes, with particular reference to the reactivities of singlet and triplet methylene in abstraction and insertion processes. The products of the reaction between methylene, prepared by the photolysis of ketene, and 1-chloropropane have been identified and estimated and their dependence on reactant pressures, photolysing wavelength and presence of foreign gases (oxygen and carbon mon­oxide) has been investigated. Both insertion and abstraction mechanisms contribute significantly to the over-all reaction, insertion being relatively much more important than with chloroethane. This type of process appears to be confined to singlet methylene. If, as seems likely, there is no insertion into C—Cl bonds under our conditions (see part IV), insertion into C2—H and C3—H bonds occurs in statistical ratio, approximately. On the other hand, the chlorine substituent reduces the probability of insertion into C—H bonds in its vicinity. As in the chloroethane system, both species of methylene show a high degree of selectivity in their abstraction reactions. We find that k S Cl / k S H >7.7, k T Cl / k T H < 0.14, where the k ’s are rate constants for abstraction, and the super- and subscripts indicate the species of methylene and the type of atom abstracted, respectively. Triplet methylene is discriminating in hydrogen abstraction from 1-C 3 H 7 Cl, the overall rates for atoms attached to C1, C2, C3 being in the ratios 2.63:1:0.

Sign in / Sign up

Export Citation Format

Share Document