Elsevier

Polyhedron

Volume 3, Issue 2, 1984, Pages 143-149
Polyhedron

Crystal structures of the dicyclohexyl-(18-crown-6) uranyl perchlorate complex and of its hydrolysis product

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Abstract

The structures of dicyclohexyl-(18-crown-6) uranyl perchlorate, [(C20H36O6)UO2] (ClO4)2 (complex I) and of dicyclohexyl-(18-crown-6) uranyl hydroxyperchlorate [C20H36O6]3 [(UO2)2(H2O)6] · (ClO4)2, CH3CN, (complex II) have been determined from three dimension X-ray diffraction data.

The uranyl group is directly coordinated to the oxygen atoms of the polyether ring in complex I; its hydrolysis (complex II) leads to a dimerization of the uranyl ions by sharing two OH groups with an U-U distance of only 3.827(8) Å. The polyether molecules are connected by hydrogen bonds with the dimeric ion [(UO2)2 (OH)2 (H2O)6]2+.

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