Syntheses and Characterizations of the Mixed Noble-Gas Compounds, [FKr II FXe II F][AsF 6 ]⋅0.5 Kr II F 2 ⋅2 HF, ([Kr II 2 F 3 ][AsF 6 ]) 2 ⋅Xe IV F 4 , and Xe IV F 4 ⋅Kr II F 2 .

Autor: Bortolus MR; Department of Chemistry, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4M1, Canada., Mercier HPA; Department of Chemistry, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4M1, Canada., Nguyen B; Department of Chemistry, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4M1, Canada., Schrobilgen GJ; Department of Chemistry, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4M1, Canada.
Jazyk: angličtina
Zdroj: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2021 Oct 25; Vol. 60 (44), pp. 23678-23686. Date of Electronic Publication: 2021 Sep 30.
DOI: 10.1002/anie.202102205
Abstrakt: Reaction of [XeF][AsF 6 ] with excess KrF 2 at -78 °C in anhydrous HF (aHF) solvent has yielded the first mixed Kr II /Xe II noble-gas compound, [FKrFXeF][AsF 6 ] ⋅0.5 KrF 2 ⋅2 HF, a salt of the [FKrFXeF] + cation. The potent oxidative fluorinating properties of Kr II fluoride species resulted in oxidation of Xe II to Xe IV in aHF at -60 °C to form the mixed Kr II /Xe IV cocrystals, ([Kr 2 F 3 ][AsF 6 ]) 2 ⋅XeF 4 and XeF 4 ⋅KrF 2 . Further decomposition at 22 °C resulted in oxidation of Xe IV to Xe VI to give the recently reported Kr II /Xe VI complexes, [F 5 Xe(FKrF) n ][AsF 6 ] (n=1, 2), [F 5 Xe][AsF 6 ], and a new Kr II /Xe VI complex, [(F 5 Xe) 2 (μ-FKrF)(AsF 6 ) 2 ], which was characterized by low-temperature (LT) Raman spectroscopy. The [FKrFXeF][AsF 6 ]⋅0.5 KrF 2 ⋅2 HF, ([Kr 2 F 3 ][AsF 6 ]) 2 ⋅XeF 4  , and XeF 4 ⋅KrF 2 compounds were characterized by LT Raman spectroscopy and single-crystal X-ray diffraction. Quantum-chemical calculations were used to assess the bonding in [FKrFXeF] + , [Kr 2 F 3 ] + , and [Xe 2 F 3 ] + and to aid in their vibrational assignments.
(© 2021 Wiley-VCH GmbH.)
Databáze: MEDLINE
Externí odkaz: