Crystal structure of M4[(UO2)2C2O4(SO4)2(NCS)2] ( M = K+, Rh+) and K4[(UO2)2C2O4(SeO4)2(NCS)2]
Abstract
Three heteroacidoligand uranyl complexes M 4[(UO2)2C2O4(SO4)2(NCS)2] ( M = K+ ( I), Rb+ ( II)) and K4[(UO2)2C2O4(SeO4)2(NCS)2] ( III) have been synthesized and their crystal structure has been determined by X-ray diffraction analysis. The compounds I III are isostructural and crystallized in the monoclinic system, sp. gr. P21/ c, Z = 2, a = 11.5548(3) Å, b = 7.0847(1) Å, c = 13.5172(3) Å, β = 93.130(1)°, V = 1104.90(4), R = 0.015 ( I); a = 11.5854(9) Å, b = 7.3841(6) Å, c = 13.9072(9) Å, β = 95.754(3)°, V = 1183.74(15), R = 0.0235 ( II); a = 11.6715(3) Å, b = 7.1418(2) Å, c = 13.8546(1) Å, β = 93.539(1)°, V = 1152.66(5), R = 0.0126 ( III). Basic structural units of these crystals are [(UO2)2C2O4( XO4)2(NCS)2]4- chains, which belong to the crystallochemical group A 2 K 02 B {2/2} M {2/1} ( A = UO{2/2+}, K 02 = C2O{2-/4}, B 2 = SO{4/2-} or SeO{4/2-}, M 1 = NCS-) of uranyl complexes. Uranium-containing chains are connected into a 3D framework via a system of electrostatic interactions with potassium or rubidium cations from outer spheres.
- Publication:
-
Crystallography Reports
- Pub Date:
- May 2008
- DOI:
- 10.1134/S1063774508030139
- Bibcode:
- 2008CryRp..53..462M
- Keywords:
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- 91.65.An