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Effective redox reactions by chromium oxide anions: Sulfur dioxide oxidation in the gas phase

International Journal of Mass Spectrometry, ISSN: 1387-3806, Vol: 436, Page: 18-22
2019
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Unprecedented redox reactions of chromium oxide anions have been observed in the gas phase and investigated by mass spectrometric techniques and electronic structure calculations. The effective oxidizing and reducing power of chromium oxide anions is unravelled by sulfur dioxide: CrO 4 − and CrO 2 − generate CrO 3 − as the reduction and oxidation product, respectively, together with SO 3 and SO as the oxidation and reduction products of SO 2, respectively. Computations predict that the reactions of CrO 4 − and CrO 2 − proceed through rather stable ion-dipole complexes and that CrO 4 - produces also a strongly bound [CrSO 6 ] - species.

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