Unexpected Reactivity of Amidogen Radical in the Gas Phase Degradation of Nitric Acid. Anglada, J., M., Olivella, S., Sole, A., & Solé, A. Journal of the American Chemical Society, 5, 2014.
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Paper Website abstract bibtex The gas phase reaction between nitric acid and amidogen radical has been investigated employing high level quantun-mechanical electronic structure methods and variational transition state theory kinetic calculations. Our results show that the reaction proceeds through a proton coupled electron transfer mechanism with a rate constant of 1.81 × 10(-13) cm(3)·molecule(-1)·s(-1) at 298 K. This value is similar to the rate constants for the reactions of hydroxyl radical with either ammonia or nitric acid. An analysis of these data in the context of the chemistry of the atmosphere suggests that the amidogen radical, formed in the oxidation of ammonia by hydroxyl radical, reacts with nitric acid regenerating ammonia. On the basis of these findings, we propose a potential new catalytic-like cycle which couples the oxidation of ammonia by hydroxyl radical and the reaction of nitric acid with amidogen radical in the Earth's atmosphere.
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abstract = {The gas phase reaction between nitric acid and amidogen radical has been investigated employing high level quantun-mechanical electronic structure methods and variational transition state theory kinetic calculations. Our results show that the reaction proceeds through a proton coupled electron transfer mechanism with a rate constant of 1.81 × 10(-13) cm(3)·molecule(-1)·s(-1) at 298 K. This value is similar to the rate constants for the reactions of hydroxyl radical with either ammonia or nitric acid. An analysis of these data in the context of the chemistry of the atmosphere suggests that the amidogen radical, formed in the oxidation of ammonia by hydroxyl radical, reacts with nitric acid regenerating ammonia. On the basis of these findings, we propose a potential new catalytic-like cycle which couples the oxidation of ammonia by hydroxyl radical and the reaction of nitric acid with amidogen radical in the Earth's atmosphere.},
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author = {Anglada, Josep M and Olivella, Santiago and Sole, Albert and Solé, Albert},
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