Rate Constant and Mechanism of the Reaction Cl + CFCl2H → CFCl2 + HCl over the Temperature Range 298–670 K in N2 or N2/O2 Diluent

2014 ◽  
Vol 118 (18) ◽  
pp. 3237-3242 ◽  
Author(s):  
E. W. Kaiser ◽  
Khadija M. Jawad
Keyword(s):  
Rate Constant ◽  
Temperature Range ◽  
Mechanism Of The Reaction

THE THERMAL DECOMPOSITION OF PERACETIC ACID IN AROMATIC SOLVENTS

1963 ◽  
Vol 41 (7) ◽  
pp. 1826-1831 ◽  
Author(s):  
F. W. Evans ◽  
A. H. Sehon
Keyword(s):  
Thermal Decomposition ◽  
Rate Constant ◽  
Peracetic Acid ◽  
First Order ◽  
Aromatic Solvents ◽  
Temperature Range ◽  
Polymeric Compounds

The thermal decomposition of peracetic acid in toluene, benzene, and p-xylene was studied over the temperature range 75–95°C. The main products of decomposition were found to be CH4, CO2, CH3COOH; small amounts of methanol, phenols, and polymeric compounds were also detected.The rate of the overall decomposition was first order with respect to peracetic acid, and the results could be explained by postulating the participation of the two simultaneous reactions:[Formula: see text] [Formula: see text]The rate constant of reaction (1) was independent of the solvent, whereas k2 was dependent on the solvent. The ratio k2/k1 was about 10.

Reactions of trifluoromethyl radicals. I. Hydrogen abstraction from dimethyl sulphide

1972 ◽  
Vol 25 (4) ◽  
pp. 803 ◽  
Author(s):  
NL Arthur ◽  
KS Yeo
Keyword(s):  
Hydrogen Atom ◽  
Rate Constant ◽  
Hydrogen Abstraction ◽  
Reverse Reaction ◽  
Thermochemical Data ◽  
Hydrogen Atom Abstraction ◽  
Dimethyl Sulphide ◽  
Temperature Range

Hydrogen atom abstraction from (CH3)2S by CF3 radicals has been studied in the temperature range 79-167�: (1) CF3 + CH3SCH3 ←→ CF3H + CH3SCH2 (-1) The rate constant, based on Ayscough's value of 1013.36cmS mol-l s-l for the recombination of CF3 radicals, is given by (k1 in cm3 mol-1 s-l, E in J mol-l): Logk1 = (12.05 � 0.02)-(28710 � 130)/2.303RT Combination of these results with thermochemical data gives a calculated value of log k-1 = 12.2 - 62600/2.303RT for the rate constant of the reverse reaction. ΔH�f(CH3SCH2) and S�(CH3SCH2) are estimated to be 155.6 kJ mol-l and 290 J K-l mol-1 respectively.

Reactions of trifluoromethyl radicals. II. Hydrogen abstraction from monochlorosilane

1973 ◽  
Vol 26 (6) ◽  
pp. 1269 ◽  
Author(s):  
NL Arthur ◽  
BR Harman
Keyword(s):  
Hydrogen Atom ◽  
Rate Constant ◽  
Experimental Error ◽  
Hydrogen Abstraction ◽  
Activation Energies ◽  
Hydrogen Atom Abstraction ◽  
Temperature Range ◽  
Average Value

Hydrogen atom abstraction from SiH3Cl by CF3 radicals ����������������� CF3 + SiH3Cl → CF3H+SiH2Cl������������������� (1) has been studied in the temperature range 69-168�. The rate constant, based on Ayscough's value of 1013.36 cm3 mol-1 s-1 for the recombination of CF3 radicals, is given by (k1 in cm3 mol-1 s-1, E in kJ mol-1): ������������������ logk1 = (12.38�0.06)-(25.72�0.41)/2.303RT At 400 K, the rate constant for CF3 + SiH3Cl is greater than the average value reported for CF3+SiHCl3 by a factor of 3.6. This is due to a difference in A factors since the activation energies are equal within experimental error.

The Action of Unsaturated Compounds on Natural Rubber in Solution. II. The Reaction Induced by Heat Alone

1952 ◽  
Vol 25 (2) ◽  
pp. 275-286
Author(s):  
André Delalande
Keyword(s):  
Free Radicals ◽  
Elevated Temperature ◽  
Natural Rubber ◽  
Addition Reaction ◽  
Thermal Reaction ◽  
Temperature Range ◽  
Unsaturated Compounds ◽  
Mechanism Of The Reaction

Abstract The addition reaction at an elevated temperature (170° C) of maleic N-methylimide with natural rubber in solution was studied. Attempts were made to apply the principles of kinetics to this thermal reaction with a view to understanding the nature of the reaction, but the complexity of the system made impossible any chance of attaining the results hoped for. A comparison of the fixation of acrylonitrile and that of maleic N-methylimide in the temperature range of 160°–200° C showed that the rates of these two reactions are in the ratio of 1 to 25–30. A determination of the unsaturation of the addition products showed that fixation is on the α-methylenic carbon atoms of the rubber hydrocarbon. Finally a mechanism of the reaction is proposed, in which free radicals play a part.

Influence of Reacting Atmosphere on Isothermal Decomposition of Ammonium Metavanadate

1994 ◽  
Vol 59 (5) ◽  
pp. 1086-1095
Author(s):  
Anwar Amin ◽  
Christine A. Philip ◽  
Badie S. Girgis
Keyword(s):  
Proton Transfer ◽  
Rate Constant ◽  
Transfer Process ◽  
Ammonium Metavanadate ◽  
Pure Oxygen ◽  
Isothermal Decomposition ◽  
Temperature Range ◽  
Retarding Effect ◽  
Proton Transfer Process ◽  
Oxidation Of Ammonia

Ammonium metavanadate (AMV) was decomposed under pure oxygen, air, nitrogen, vacuum and controlled humidity, in the temperature range of 453 to 623 K. Three well established limiting conversions appear corresponding to the formation of ammonium tetravanadate at 453 K (50%), ammonium hexavanadate at 503 K (67%), and V2O5 at 623 K (100%). Oxidizing atmospheres have a retarding effect at 453 K but an accelerating one at 573 to 623 K, as observed from the reaction limiting time and rate constant. In addition to H2O and N2, oxygen plays an important role in the oxidation of ammonia to N2, and in the proton transfer process.

The rate constant of NO + O3 ? NO2 + O2 in the temperature range of 283-443 K

1980 ◽  
Vol 12 (8) ◽  
pp. 547-554 ◽  
Author(s):  
H. H. Lippmann ◽  
Barbara Jesser ◽  
Ulrich Schurath
Keyword(s):  
Rate Constant ◽  
Temperature Range
Sign in / Sign up

Export Citation Format

Share Document