The Crystal Structure of [UO2(NO3)2(H2O)2]·(DB18C6)2

Abstract

Abstract: The crystal and molecular structure of the title compound was determined by single crystal X-ray diffraction. The complex crystal belongs to a monoclinic, space group P2₁/n with Z=2. Lattice parameters are: a=11.782(2)Å, b=8.584(2)Å, c=22. 631(2)Å,β=98.29(2)°, V= 2265.1 Å³. The structure was analyzed by Patterson and Fourier techniques and refined by full-matrix least-squares to R=0. 066 for 3024 reflections. The uranyl group is not located within the crown ether. Rather, the structure consists of neutral UO₂(NO₃)₂(H₂O)₂ units and separate crown ether molecules connected by hydrogen bonding through coordinate water molecules. The oxygen atoms of the linear uranyl group are coordinated only to uranium; the eight-coordination of uranium is completed by six equatorial oxygen donors, two from water and four from bidentate nitrate groups. Each uranium is coordinated in a slight distorted hexagonal bipyramid configuration.

Key words: Uranyl nitrate, Dibenzo-18-crown-6, Complex, Crystal structure

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Gan Xinmin, Tang Ning, Wang Xin, Zhu Ying, Tan Minyu . The Crystal Structure of [UO₂(NO₃)₂(H₂O)₂]·(DB18C₆)₂[J]. Chem. J. Chinese Universities, 1990, 11(1): 46.

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The Crystal Structure of [UO₂(NO₃)₂(H₂O)₂]·(DB18C₆)₂

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