Abstract
Ammonium trinitratouranylate NH4[UO2(NO3)3] (I) single crystals have been synthesized by the reaction of aqueous solutions of diaquadinitratouranyl tetrahydrate and ammonium nitrate in the presence of nitric acid. The structure of the complex has been studied by X-ray diffraction analysis: space group \(R\bar 3c\), a = 9.361(2), c = 18.883(4) A; V = 1433.0(5) A3, and Z = 6. The structural units of the NH4[UO2(NO3)3] crystal—NH4+ cations and [UO2(NO3)3]− complex anions with three bidentate cyclic nitrato groups—are on crystallographic axes \(\bar 3\). A complex three-dimensional packing arranged by the electrostatic attraction forces between counterions and the N-H...O hydrogen bonds between ammonium cations and trinitratouranylate anions is realized in the structure. X-ray diffraction analysis results are confirmed by IR spectra of NH4[UO2(NO3)3].
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