Gas phase reactions of CF3, C2F5, and n‐C3F7 with carbon tetrachloride

Vöhringer, Cecilia M. de; Staricco, E. H.

doi:10.1002/kin.550161107

Cited by 9 publications

(2 citation statements)

References 6 publications

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“…Based on the transition state theory and evaluation of the available experimental data in the literature, Benson proposed that most of A factors for radical–molecule metathesis reactions (not involving atoms) are 10 11.5 ± 0.5 cm 3 mol −1 s −1 under reaction conditions, similar to those in our investigation. The activation energies (43.1 and 33.9 kJ mol −1 ) are also plausible if we consider activation energy values for similar Cl or Br abstraction reactions 52–58.…”

Section: Resultsmentioning

confidence: 99%

Experimental and computational studies of the thermal decomposition of halon 1211

Kennedy

Uddin

et al. 2005

Int J of Chemical Kinetics

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Thermal pyrolysis of halon 1211 (CBrClF 2 ), diluted in nitrogen, in a tubular alumina reactor, has been studied over the temperature range of 773-1073 K at residence times from 0.3 to 2 s. At temperatures below 973 K, the major products were CCl 2 F 2 , CBr 2 F 2 , C 2 Cl 2 F 4 , C 2 BrClF 4 , C 2 F 4 , and C 2 Br 2 F 4 . Further increasing temperature resulted in the formation of CBrF 3 , CClF 3 , and many other species whose formation necessitated the rupture of C F bonds. Coke formation was also observed on the surface of the reactor at high temperatures. A kinetic reaction scheme involving 16 species and 25 reaction steps was developed and applied to model the thermal pyrolysis of halon 1211 over the temperature range of 773-973 K. Sensitivity analysis suggests that the reaction CBrClF 2 + CClF 2 → CCl 2 F 2 + CBrF 2 constitutes the major pathway for the decomposition of halon 1211 under the conditions investigated. C 2005 Wiley Periodicals, Inc. Int J Chem Kinet 37: [134][135][136][137][138][139][140][141][142][143][144][145][146] 2005

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Section: Resultsmentioning

confidence: 99%

Experimental and computational studies of the thermal decomposition of halon 1211

Kennedy

Uddin

et al. 2005

Int J of Chemical Kinetics

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“…[16]. h From of the back-reaction has been estimated by means of the Polanyi-Evans method [17] using E for i E CCl ϩ C Cl : CCl ϩ C Cl и и [18] and the back-reactions of [19] and [20]. и и results as those in [3].…”

Section: Methodsmentioning

confidence: 99%

Kinetics and mechanism of the pyrolysis of 1-chloro-1,1-difluoroethane in the presence of additives

Huybrechts

Assche

Auwera

1998

Int. J. Chem. Kinet.

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The thermal dehydrochlorination has been studied CF ClCH : CF " CH ϩ HCl 2 3 2 2 in a static system between 597 and in the presence of CCl 4 , C 2 Cl 6 , CF 2 "CH 2 , HCl, and 664 K CF 3 CH 3 . A kinetic radical and molecular reaction model has been developed. In addition to describing earlier results on the acceleration of the pyrolysis by CCl 4 and the further acceleration by HCl, this model describes quantitatively up to conversions of 20% (i) the dependence of the catalytic effect of CCl 4 at low concentrations, (ii) the stronger catalytic effect of C 2 Cl 6 , and (iii) the inhibitory effect of added CF 2 CH 2 and CF 3 CH 3 when CCl 4 is used as a catalyst.

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Chlorine abstraction reaction from chloropentafluorobenzene by the CF₃ radical

Nieto

Herrera

Lane

et al. 1998

Ber Bunsenges Phys Chem

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The temperature dependence of the rate constant for the gas phase abstraction reaction of chlorine by CF3 from chloropentafluorobenzene was determined in the temperature range 573-653 K by the competitive method using the recombination of CF3 radicals as reference reaction. Taking a value of 1.53.1013 cm3 mol-' s-' for the recombination rate constant, k1=(6.7&1.26) 10" exp [-(6339*103) W q cm3 mol-' sd.The Arrhenius parameters were calculated by the Bond Strength-Bond Length method (BSBL) and good agreement was obtained with the experimental values. Acta A 30, 1225 (1974). E 9776

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Gas phase reactions of CF₃, C₂F₅, and n‐C₃F₇ with carbon tetrachloride

Cited by 9 publications

References 6 publications

Experimental and computational studies of the thermal decomposition of halon 1211

Experimental and computational studies of the thermal decomposition of halon 1211

Kinetics and mechanism of the pyrolysis of 1-chloro-1,1-difluoroethane in the presence of additives

Chlorine abstraction reaction from chloropentafluorobenzene by the CF₃ radical

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Gas phase reactions of CF3, C2F5, and n‐C3F7 with carbon tetrachloride

Cited by 9 publications

References 6 publications

Experimental and computational studies of the thermal decomposition of halon 1211

Experimental and computational studies of the thermal decomposition of halon 1211

Kinetics and mechanism of the pyrolysis of 1-chloro-1,1-difluoroethane in the presence of additives

Chlorine abstraction reaction from chloropentafluorobenzene by the CF3 radical

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Product

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Gas phase reactions of CF₃, C₂F₅, and n‐C₃F₇ with carbon tetrachloride

Chlorine abstraction reaction from chloropentafluorobenzene by the CF₃ radical