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Uranyl(VI) compounds. 3. Crystal structures of two forms of bis(urea)dioxouranium(VI) sulfate

Journal Article · · Inorg. Chem.; (United States)
DOI:https://doi.org/10.1021/ic00152a027· OSTI ID:5860508
;

The structures of the ..cap alpha.. and ..beta.. forms of the title compound UO/sub 2/SO/sub 4/.2CO(NH/sub 2/)/sub 2/ are similar. The uranium atom lies at the center of a pentagonal bipyramid formed by the oxygen atoms. Of the 5 equatorial oxygens, 3 belong to sulfate groups and two to urea molecules. The bridging tridentate sulfate groups join the bipyramids into infinite double chains in the same fashion as in uranyl sulfate hydrates. Selected interatomic distances and angles are listed. The distances and angles in UO/sub 7/ polyhedra are in close agreement with values reported for other related uranyl sulfates. The U-O (uranyl) bond distances in the ..cap alpha.. form are unusually long, exceeding 1.8 A. The U-O (urea) distances in the ..beta.. are slightly longer than in the ..cap alpha.. form. The orientation of the planar area molecules is different in the 2 forms. The urea molecules are involved in the hydrogen bonding within and between the chains. The main structural difference between the 2 forms lies in the packing of the chains. The packing efficiency is slightly greater in the ..cap alpha.. form as the unit cell volume is 2.3% smaller. 2 figures, 5 tables.

OSTI ID:
5860508
Journal Information:
Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 22:10; ISSN INOCA
Country of Publication:
United States
Language:
English

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Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400702* -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ACTINIDE COMPLEXES
ACTINIDE COMPOUNDS
AMIDES
BOND ANGLE
CHALCOGENIDES
COHERENT SCATTERING
COMPLEXES
CRYSTAL STRUCTURE
CRYSTALLOGRAPHY
DATA
DIFFRACTION
DISTANCE
EXPERIMENTAL DATA
INFORMATION
INTERATOMIC DISTANCES
LIGANDS
MOLECULAR STRUCTURE
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SCATTERING
STRUCTURAL CHEMICAL ANALYSIS
SULFATES
SULFUR COMPOUNDS
URANIUM COMPLEXES
URANIUM COMPOUNDS
URANIUM OXIDES
URANIUM SULFATES
X-RAY DIFFRACTION