Investigation of Molecular Alkali Tetrafluorido Aurates by Matrix-Isolation Spectroscopy
Frenio A Redeker1, Mathias A Ellwanger1, Helmut Beckers1
1Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstr. 34/36, 14195, Berlin, Germany.
Abstract:
Molecular alkali tetrafluorido aurate ion pairs M[AuF4 ] (M=K, Rb, Cs) are produced by co-deposition of IR laser-ablated AuF3 and MF in solid neon under cryogenic conditions. This method also yields molecular AuF3 and its dimer Au2 F6 . The products are characterized by their Au-F stretching bands and high-level quantum-chemical calculations at the CCSD(T)/triple-ζ level of theory. Structural changes in AuF4 - associated with the coordination of the anion to different alkali cations are proven spectroscopically and discussed.
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