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Penta-ammine dioxide uranium(V) nitrate ammonia (1/1), [UO 2 (NH 3 ) 5 ]NO 3 ·NH 3 , was obtained in the form of yellow crystals from the reaction of caesium uranyl nitrate, Cs[UO 2 (NO 3 ) 3 ], and uranium tetra-fluoride, UF 4 , in dry liquid ammonia. The [UO 2 ] + cation is coordinated by five ammine ligands. The resulting [UO 2 (NH 3 ) 5 ] coordination polyhedron is best described as a penta-gonal bipyramid with the O atoms forming the apices. In the crystal, numerous N-H⋯N and N-H⋯O hydrogen bonds are present between the cation, anion and solvent mol-ecules, leading to a three-dimensional network.

Crystal structure of [UO2(NH3)5]NO3·NH3

Crystal structure of [UO₂(NH₃)₅]NO₃·NH₃