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Crystal and molecular structure of bis(tropolonato)-dioxo-(ethanol)uranium(vi)

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Abstract

Crystals of bis(tropolonato)-dioxo(ethanol)uranium(VI) are orthorhombic:a = 12·495(8),b = 8·817(7),c = 15·459(9) Å,Z = 4, space groupPnam. The structure was determined with MoKα diffractometer data by standard Patterson and Fourier methods, and was refined by full-matrix least-squares methods toR = 0·049 for 1289 observed reflexions.

The coordination plane consists of the four tropolonato oxygen atoms and the oxygen from the ethanol ligand; the uranyl group is perpendicular to it. The molecule lies across the mirror plane, consistent with a boat conformation for the tropolone rings; the dihedral angle between the plane of tropolone ring and the coordination plane is 22·5 °. The deviations of the tropolonato oxygen atoms from the tropolonato plane are 0·08 Å (above) and 0·16 Å (below). It is almost certain that the ethyl group of the ethanol ligand does not lie in the symmetry plane; C(8) is about 0·3 Å on one side of this plane and C(9) is about the same distance on the other, within a satisfactory bonding scheme.

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Authors and Affiliations

  1. Laboratorio di Chimica e Tecnologia dei Radioelementi del C.N.R., Via Vigonovese, 52-35100, Padova, Italy

    D. A. Clemente, G. Bandoli, M. Vidali, P. A. Vigato, R. Portanova & L. Magon

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  1. D. A. Clemente
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  2. G. Bandoli
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  3. M. Vidali
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  4. P. A. Vigato
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  5. R. Portanova
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  6. L. Magon
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Clemente, D.A., Bandoli, G., Vidali, M. et al. Crystal and molecular structure of bis(tropolonato)-dioxo-(ethanol)uranium(vi). Journal of Crystal and Molecular Structure 3, 221–233 (1973). https://doi.org/10.1007/BF01236643

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  • DOI: https://doi.org/10.1007/BF01236643

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