STRUCTURE AND ENERGY STUDY OF ОІ-DIKETONATES. XV. COMPOSITION OF SUPERHEATED VAPORS AND STRUCTURE OF MONOMERIC MOLECULES OF Tris-HEXAFLUOROACETYLACETONATES OF DYSPROSIUM, HOLMIUM, ERBIUM, AND YTTERBIUM
N. V. Tverdova, G. V. Girichev, V. V. Rybkin, S. A. Shlykov, N. P. Kuzmina, I. G. Zaitseva
Keywords: gas-phase electron diffraction, DFT, mass-spectrometry, molecular structure, tris-hexafluoroacetylacetonate, REE
Pages: 1040-1050
Abstract
The molecular structure of tris-hexafluoroacetylacetonates of dysprosium, holmium, erbium, and ytterbium (M(hfa)3, M = Dy, Ho, Er, Yb) is studied in the framework of synchronous electron diffraction and mass-spectrometric experiment and also quantum-chemically. For all M(hfa)3 complexes structural parameters ra, rg, and rh1 are found. It is established that the coordination polyhedron LnO6 has a configuration of D3 symmetry. In experiments on superheated vapors of Dy(hfa)3, Ho(hfa)3, and Yb(hfa)3 the molecular forms present in the vapor at different degrees of superheat are determined.
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