Synthesis and structure of R 2[UO2(NO3)2(NCS)2] (R = Rb or Cs)
Autor: | Eugenia V. Peresypkina, Victor N. Serezhkin, V. A. Grigor’eva, Larisa B. Serezhkina, A. V. Virovets |
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Rok vydání: | 2015 |
Předmět: | |
Zdroj: | Crystallography Reports. 60:46-51 |
ISSN: | 1562-689X 1063-7745 |
Popis: | Crystals Rb2[UO2(NO3)2(NCS)2] (I) and Cs2[UO2(NO3)2(NCS)2] (II) have been synthesized and studied by IR spectroscopy and X-ray diffraction. Crystals I are monoclinic, with the following parameters: a = 12.2118(5) A, b = 10.2545(3) A, c = 11.8754(4) A, β = 110.287(1)°, sp. gr. C2/c, Z = 4, and R = 0.0523. Crystals II are orthorhombic, with a = 13.7309(3) A, b = 10.5749(2) A, c = 10.1891(2) A, sp. gr. Pnma, Z = 4, and R = 0.0411. The basic structural units of crystals I and II are one-core complexes [UO2(NO3)2(NCS)2]2−, which belong to the crystallochemical group cis-AB201M21 (A = UO22+, B01 = NO3−, M1 = NCS−), which are combined into a framework via electrostatic interactions with ions of alkaline metals R (R = Rb or Cs). The structural features of crystals I and II, which condition the formation of [UO2(NO3)2(NCS)2]2− complexes with a cis rather than a trans position of isothiocyanate ions in the coordination sphere of uranyl ions, are discussed. |
Databáze: | OpenAIRE |
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