Author： Charushnikova I. Krot N. Starikova Z.
Publisher： MAIK Nauka/Interperiodica
ISSN： 1066-3622
Source： Radiochemistry, Vol.46, Iss.6, 2004-11, pp. : 556-559
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Abstract
Crystalline uranyl phthalate dihydrate was prepared by hydrothermal method, and its crystal structure was determined. The crystal structure consists of infinite chains [UO2LH2O]n coupled in bands [(UO2)2L2(H2O)2]n [L = C6H4(COO)2], between which water molecules of crystallization are located. The coordination polyhedron of uranium atoms is a pentagonal bipyramid with the equatorial plane formed by oxygen atoms of three phthalate ions and coordinated water molecule. The U-O bond length in the UO 22+ cations is 1.766 Å. The coordination capacity of the ligands is 4. Anions are bidentately coordinated to uranium atoms to form seven-membered rings. Being bridging ligands, phthalate ions combine the neighboring uranium atoms into chains through one carboxy group, and the chains into bands, through the other carboxy group.
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