Schwingungsspektren von Oxofluorokomplexen der Spezies NbOF, TaOF, MoO₂F, WO₂F, NbOF und MoO₂F

Abstract

Die Schwingungsspektren (IR und Raman) folgender Komplexe werden registriert und zugeordnet: A2NbOF5 (A = Rb, Cs), Cs2TaOF5, A2MoO2F4 (A = Rb, Cs, NH4), A2WO2F4 (A = Rb, Cs), (NH4)3NbOF6 und (NH4)3MoO2F5.

The preparation of new oxoniobium(V) complexes from hydrated Niobium(V) Oxide: the crystal and molecular structure of Oxotris(2-pyridinolato-N-oxide)niobium(V)

“…The characteristic frequencies for the Nb=O bond are observed as prominent absorptions at 901, 915 and 885 cm )1 for (1), (2) and (3), respectively; other strong infrared bands at 555, 626 and 564 cm )1 are attributed to antisymmetric Nb-O vibrations, according to previously reported data [20,21].…”

[pyH]2[Cu(py)4(MX6)2] (MX6 = ZrF62-, NbOF52-, MoO2F42-; py = Pyridine): Rarely Observed Ordering of Metal Oxide Fluoride Anions

“…One of these trans fluorides bonds to the copper, while the other hydrogen-bonds with the pyH + cation. The infrared spectrum of the compound shows two MoO stretching frequencies at 950 and 906 cm -1 for the symmetric and asymmetric stretches, respectively, confirming the cis nature of the oxides . The Mo−F stretching region contains one strong, broad peak at 549 cm -1 and two weaker peaks at 455 and 425 cm -1 .…”

The Polar [WO2F4]2- Anion in the Solid State

“…The symmetric and asymmetric (WO 2 ) stretching frequencies of the cis -[WO 2 F 4 ] 2- anion are observed in both the infrared and Raman spectra, while a trans -[WO 2 F 4 ] 2- geometry would show only the asymmetric stretch in the infrared and the symmetric stretch in the Raman. The infrared spectra of all reported compounds containing the [WO 2 F 4 ] 2- anion show the characteristic stretching frequencies of the cis -[WO 2 F 4 ] 2- anion (ν s (WO 2 ) = 950−960 cm -1 , ν as (WO 2 ) = 900−910 cm -1 ). , …”