ISSN:
0538-8066
Keywords:
Chemistry
;
Physical Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Rate constants have been determined at 296 ± 2 K for the gas phase reaction of NO3 radicals with a series of aromatics using a relative rate technique. The rate constants obtained (in cm3 molecule-1 s-1 units) were: benzene, 〈2.3 × 10-17; toluene, (1.8 ± 1.0) × 10-17; o—xylene, (1.1 ± 0.5) × 10-16; m—xylene, (7.1 ± 3.4) × 10-17; p—xylene, (1.4 ± 0.6) × 10-16; 1,2,3-trimethylbenzene, (5,6 ± 2.6) × 10-16; 1,2,4-trimethylbenzene (5.4 - 2.5) × 10-16; 1,3,5-trimethylbenzene, (2.4 ± 1.1) × 10-16; phenol, (2.1 ± 0.5) × 10-12; methoxybenzene, (5.0 ± 2.8) × 10-17; o-cresol, (1.20 ± 0.34) × 10-11; m-cresol, (9.2 ± 2.4) × 10-12; p-cresol, (1.27 ± 0.36) × 10-11; and benzaldehyde, (1.13 ± 0.25) × 10-15. These kinetic data, together with, in the case of phenol, product data, suggest that these reactions proceed via H-atom abstraction from the substituent groups. The magnitude of the rate constants for the hydroxy-substituted aromatics indicates that the nighttime reaction of NO3 radicals with these aromatics can be an important loss process for both NO3 radicals and these organics, as well as being a possible source of nitric acid, a key component of acid deposition.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/kin.550160709
