Rb2[U(NH2)6], a Rubidium Hexaamidouranate(IV) obtained from the Reaction of UI3 with RbNH2 in Anhydrous Ammonia

Stefan S. Rudel, Antti J. Karttunen, Florian Kraus*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review


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 Fm3m, 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–.

Original languageEnglish
JournalZeitschrift fur Anorganische und Allgemeine Chemie
Publication statusE-pub ahead of print - Apr 2020
MoE publication typeA1 Journal article-refereed


  • Uranium
  • Amides
  • Liquid ammonia
  • Alkali metals
  • Ammonia reduction

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