12191-01-4Relevant articles and documents
New syntheses and properties of XeO2F2, Cs+XeO2F3-, and NO2+[XeO2F3·nXeO 2F2]-
Christe, Karl O.,Wilson, William W.
, p. 3763 - 3768 (2008/10/08)
Alkali-metal nitrates and N2O5 are useful reagents for the stepwise replacement of two fluorine atoms by one oxygen atom in xenon fluorides or oxyfluorides. Thus, the reaction of an excess of XeF6 with CsNO3 yields XeOF4, FNO2, and CsXeF7 in high yield. With CsNO3 in excess, the primary products are CsXeOF5 and FNO2, and after longer reaction times some CsXeO2F3 is also formed. The reaction of CsNO3 with an excess of XeOF4 produces FNO2 and XeO2F2 in quantitative yield with a mixture of CsF and CsXeOF5 as the byproducts. Recrystallization of this CsF-CsXeOF5-XeO2F2 mixture from anhydrous HF provides a convenient synthesis for CsXeO2F3. The reaction of N2O5 with an excess of XeOF4 results in XeO2F2 and FNO2, thus providing a new safe synthesis for XeO2F2. Vibrational spectra of liquid, solid, and Ar-matrix-isolated XeO2F2 are reported. With FNO2, xenon dioxide difluoride forms an unstable NO2+[XeO2F3·nXeO 2F2]- adduct, which was characterized by Raman spectroscopy. The vibrational spectra of CsXeO2F3 were recorded and assigned. It is shown that the two oxygen atoms in XeO2F3- are cis and not trans to each other and that the Raman spectrum previously attributed to Cs+XeO2F3- is due to a Cs+[XeO2F3·nXeF2]- adduct.
