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The Highest Oxidation State of Rhodium: Rhodium(VII) in [RhO3 ].

ABSTRACT: Although the highest possible oxidation states of all transition elements are rare, they are not only of fundamental interest but also relevant as potentially strong oxidizing agents. In general, the highest oxidation states are found in the electron-rich late transition elements of groups 7-9 of the periodic table. Rhodium is the first element of the 4d transition metal series for which the highest known oxidation state does not equal its group number of 9, but reaches only a significantly lower value of +6 in exceptional cases. Higher oxidation states of rhodium have remained elusive so far. In a combined mass spectrometry, X-ray absorption spectroscopy, and quantum-chemical study of gas-phase RhOn+ (n=1-4), we identify RhO3+ as the 1A1' trioxidorhodium(VII) cation, the first chemical species to contain rhodium in the +7 oxidation state, which is the third-highest oxidation state experimentally verified among all elements in the periodic table.

SUBMITTER: da Silva Santos M 

PROVIDER: S-EPMC9544489 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature

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The Highest Oxidation State of Rhodium: Rhodium(VII) in [RhO<sub>3</sub> ].

da Silva Santos Mayara M   Stüker Tony T   Flach Max M   Ablyasova Olesya S OS   Timm Martin M   von Issendorff Bernd B   Hirsch Konstantin K   Zamudio-Bayer Vicente V   Riedel Sebastian S   Lau J Tobias JT  

Angewandte Chemie (International ed. in English) 20220810 38

Although the highest possible oxidation states of all transition elements are rare, they are not only of fundamental interest but also relevant as potentially strong oxidizing agents. In general, the highest oxidation states are found in the electron-rich late transition elements of groups 7-9 of the periodic table. Rhodium is the first element of the 4d transition metal series for which the highest known oxidation state does not equal its group number of 9, but reaches only a significantly lowe  ...[more]

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