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- Title
A spatially separated [KBr<sub>6</sub>]<sup>5−</sup> anion in the cyanido-bridged uranium(IV) compound [U<sub>2</sub>(CN)<sub>3</sub>(NH<sub>3</sub>)<sub>14</sub>]<sup>5+</sup>[KBr<sub>6</sub>]<sup>5−</sup>·NH<sub>3</sub>.
- Authors
Deubner, H. Lars; Kraus, Florian
- Abstract
The reaction of uranium tetrabromide with potassium cyanide in anhydrous liquid ammonia at room temperature leads to the formation of brown crystals of [U2(CN)3(NH3)14]5+ [KBr6]5− · NH3. We determined the crystal structure of the compound by single crystal X-ray diffraction. To the best of our knowledge it contains the unprecedented spatially separated [KBr6]5− anion and presents the first uranium(IV) cyanide compound which forms a layer structure. The compound crystallizes in the trigonal space group P3̅m1 (No. 164) with a = 10.3246(13), c = 8.4255(17) Å, V = 777.8(3) Å3, Z = 1 at T = 100 K and is well described with the Niggli formula [ U (CN) 3 2 (NH 3) 7 1 ] ∞ 2 2 [ KBr 6 1 ]. $\mathop {} \limits_{\infty}^{2}{\left[ {{\rm{U}}{{({\rm{CN}})}_{{3 \over 2}}}{{({\rm{N}}{{\rm{H}}_3})}_{{7 \over 1}}}} \right]_2}\left[ {{\rm{KB}}{{\rm{r}}_{{6 \over 1}}}} \right].$
- Subjects
URANIUM compounds; POTASSIUM cyanide; URANIUM; AMMONIA; LIQUID ammonia; SINGLE crystals
- Publication
Zeitschrift für Naturforschung B: A Journal of Chemical Sciences, 2020, Vol 75, Issue 1/2, p111
- ISSN
0932-0776
- Publication type
Article
- DOI
10.1515/znb-2019-0161