ISSN:
0538-8066
Keywords:
Chemistry
;
Physical Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The high-pressure absolute rate constants for the decomposition of nitrosobenzene and pentafluoronitrosobenzene were determined using the very-low-pressure pyrolysis (VLPP) technique.Bond dissociation energies of DH0(C6H5—NO) = 51.5 ± 1 kcal/mole and DH0 (C6F5—NO) = 50.5 ± 1 kcal/mole could be deduced if the radical combination rate constant is set at log kr(M-1·sec-1) = 10.0 ± 0.5 for both systems and the activation energy for combination is taken as 0 kcal/mole at 298°K. δHf0(C6H5NO), δHf0(C6F5NO), and δHf0(C6F5) could be estimated from our kinetic data and group additivity. The values are 48.1 ± 1, -160 ± 2, and - 130.9 ± 2 kcal/mole, respectively. C-X bond dissociation energies of several perfluorinated phenyl compounds, DH0(C6F5-X), were obtained from the reported values of δHf0(C6F5X) and our estimated δHf0(C6F5) [X = H, CH3, NO, Cl, F, CF3, I, and OH].
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/kin.550070508
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