Rb2[U(NH2)6], a Rubidium Hexaamidouranate(IV) obtained from the Reaction of UI3 with RbNH2 in Anhydrous Ammonia |
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| Authors: | Stefan S. Rudel Antti J. Karttunen Florian Kraus |
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| Affiliation: | 1. Anorganische Chemie mit Ausrichtung Fluorchemie, Philipps-Universität Marburg, Hans-Meerwein-Str. 4, 35032 Marburg, Germany;2. Department of Chemistry and Materials Science, Aalto University, 00076 Aalto, Finland |
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| Abstract: | The pyrophoric compound Rb2[U(NH2)6] was obtained as a grey to black powder from the reaction of more than three equivalents of RbNH2 with UI3 in anhydrous liquid ammonia. During the process, UIII is oxidized to UIV and ammonia is reduced under evolution of H2. Rb2[U(NH2)6] crystallizes in the cubic crystal system, space group Fm3 m, with the lattice parameter a = 9.7870(12) Å, V = 937.4(2) Å3, Z = 4 at T = 293 K. It is isotypic to K2PtCl6. The compound contains the unprecedented hexaamidouranate(IV) anion [U(NH2)6]2–. |
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| Keywords: | Uranium Amides Liquid ammonia Alkali metals Ammonia reduction |
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