Abstract
The title compound, [UO2(acac)2(H2O)] consists of a uran-yl(VI) unit ([O=U=O]2+) coordinated to two monoanionic acetyl-acetonate (acac, C5H7O2) ligands and one water mol-ecule. The asymmetric unit includes a one-half of a uranium atom, one oxido ion, one-half of a water mol-ecule and one acac ligand. The coordination about the uranium atom is distorted penta-gonal-bipyramidal. The acac ligands and Ow atom comprise the equatorial plane, while the uranyl O atoms occupy the axial positions. Inter-molecular hydrogen bonding between complexes results in the formation of two-dimensional hexa-gonal void channels along the c-axis direction with a diameter of 6.7 Å. The monoclinic (P21/c space group) polymorph was reported by Alcock & Flanders [(1987). Acta Cryst. C43, 1480-1483].
Highlights
The title compound, [UO2(acac)2(H2O)] consists of a uranyl(VI) unit ([O U O]2+) coordinated to two monoanionic acetylacetonate ligands and one water molecule
The asymmetric unit includes a one-half of a uranium atom, one oxido ion, one-half of a water molecule and one acac ligand
One method for preparing actinide source materials includes the preparation of volatile compounds which can be deposited onto a conductive surface from the vapor phase
Summary
Nuclear forensics applications often require the development of source materials for isotope-dilution mass-spectrometry measurements. An alternative method involves electrochemical reduction to the zero-valent metal with concurrent deposition onto the electrode surface The equatorial plane composed of O1, O2 (and the two other symmetry-equivalent atoms) and O4 deviates noticeably from planarity [with a mean deviation of 0.172 (3) A ]. The void volume was determined using contact surface maps (which offer an estimate of the volume that could be filed by guest molecules) to be 325.41 A 3, representing 13.4% of the unit-cell volume (Barbour, 2006).
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