Mendiara, S. N. and Ghibaudi, E. and Perissinotti, L. J. and Colussi, A. J. (1992) Free radicals and diradicals in the reaction between nitrous acid and bisulfite in acid aqueous media. Journal of Physical Chemistry, 96 (20). pp. 8089-8091. ISSN 0022-3654. doi:10.1021/j100199a048. https://resolver.caltech.edu/CaltechAUTHORS:20150623-154806565
Full text is not posted in this repository. Consult Related URLs below.
Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20150623-154806565
Abstract
Rates of the prompt formation of (HSO_3)_2NO•(F) in the reaction of nitrous acid with bisulfite were measured by stopped-flow electron spin resonance spectrometry at pH = 3.0-5.8, 298 K. Initial rates have a positive dependence on (HONO] and [HSO_3^-] but decrease markedly with pH. The induction periods observed in air-saturated solutions are suppressed by addition of 2 mM hydroxylaminedisulfonate, (SO_3^-)_2NOH (FH), revealing a free-radical precursor to F. The spin trap 5.5-dimethyl-1-pyrroline N-oxide (DMPO) also inhibits the formation of F but without producing new paramagnetic species, ruling out monoradical intermediates. We show that these observations are consistent with the previously proposed participation of a nitrene, HON:, in this system. Present evidence suggests that the title reaction is a potential source of free radicals in natural environments.
| Item Type: | Article | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Related URLs: |
| |||||||||
| ORCID: |
| |||||||||
| Additional Information: | © 1992 American Chemical Society. (Received: May 27, 1992) This study was financially supported by CONICET and CIC of Argentina. E. G. and L. J. P. are members of the scientific staff of CIC. | |||||||||
| Funders: |
| |||||||||
| Issue or Number: | 20 | |||||||||
| DOI: | 10.1021/j100199a048 | |||||||||
| Record Number: | CaltechAUTHORS:20150623-154806565 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20150623-154806565 | |||||||||
| Official Citation: | Free radicals and diradicals in the reaction between nitrous acid and bisulfite in acid aqueous media S. N. Mendiara, E. Ghibaudi, L. J. Perissinotti, and A. J. Colussi The Journal of Physical Chemistry 1992 96 (20), 8089-8091 DOI: 10.1021/j100199a048 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 58516 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | George Porter | |||||||||
| Deposited On: | 25 Jun 2015 22:50 | |||||||||
| Last Modified: | 10 Nov 2021 22:06 |
Repository Staff Only: item control page
