Abstract
Crystal structure of monomeric yttrium(III) dipivalylmethanate, YO6C33H57, has been studied by X-ray diffraction. Crystal data: a=17.868(3), b=9.977(2), c=10.633(2) Å, V=1895.7 Å3, space group Pmn21, Z=2, dcalc=1.116, dexp=1.119 g/cm3. The compound has a molecular structure and consists of monomeric molecules with a proper symmetry plane m. In the metallocycle lying in this plane, Y-O interatomic distances and O−Y−O bond angles markedly differ from the similar distances and angles in the other two planes. The average Y−O, O−C, and C−C distances are 2.22, 1.25, and 1.46 Å, respectively. As a result of comparative crystal-chemical analysis carried out for related compounds, the coordination polyhedra around the yttrium atoms were found to be trigonal prisms formed by six oxygen atoms of three bidentate ligands. Layers ∼1 μm thick were obtained by vapor condensation of the complex on different supports; the layers were investigated by XRD. Irrespective of the type of support, the layers are oriented polycrystalline films with [001] texture axes. Arrangement of the adsorbed molecules of the complex is analyzed. The layers are self-organized into close-packed structures with C(CH3)3 groups oriented toward supports.
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Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences. Translated fromZhurnal Strukturnoi Khimii, Vol. 36, No. 3, pp. 541–547, May–June, 1995.
Translated by L. Smolina
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Gromilov, S.A., Baidina, I.A., Prokhorova, S.A. et al. Crystal and molecular structure of monomeric yttrium(III) dipivalylmethanate. Arrangement of adsorbed layers. J Struct Chem 36, 496–501 (1995). https://doi.org/10.1007/BF02578537
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DOI: https://doi.org/10.1007/BF02578537