Systems xenon hexafluoride-arsenic pentafluoride and xenon hexafluoride-phosphorus pentafluoride

Chemical Bonding in the Complexes XeF 5 + XF 6 − (X = P, As, Sb, and Bi)

“…In the resulting structure, the Xe atom in the base of the square-pyramidal cation forms three bonds with the bridging F b atoms (b = 6, 7, and 8). The symmetry of the fragment is close to C 4ν , which agrees with experimental data for crystals and solutions [2,4,[5][6][7][8][9]. The axial F 1 atom is closer to the Xe atom than are equatorial atoms, regardless of the basis set ( Table 1).…”

“…However, the literature data on their quantum-chemical calculations are unavailable. X-ray diffraction analysis of such complexes with X = P, As, Sb, and Bi in the solid state [2,4] and Raman and 19 F NMR studies of in hydrofluoric acid solutions [2,[5][6][7][8][9] revealed that the XeF 5 fragment exists as a cation with a symmetry close to C 4 ν . As for the anion, its structure is usually a distorted octahedron [4].…”

Crystal Growth and Characterization of the Mixed‐Cation Rb+/[XeF5]+ and Cs+/[XeF5]+ Salts

“…It is possible that some 2XeF 6 · PF 5 or as‐yet‐unknown XeF 6 · PF 5 was formed as an intermediate. The former decomposes to XeF 6 and PF 5 at ambient temperature, where XeF 6 can react with [XeF 5 ][SbF 6 ], yielding [Xe 2 F 11 ][SbF 6 ], and the PF 5 is removed as a gas.…”

“…(1) It is possible that some 2XeF 6 ·PF 5 [6] or as-yet-unknown XeF 6 ·PF 5 was formed as an intermediate. The former decomposes to XeF 6 and PF 5 6 ]anions, which show eclipsed stacks when the crystal structure is viewed along the c axis ( Figure 1).…”

“…As a consequence, the unit cell of the α form is doubled (Table 2), and F atoms of SbF 6 and XeF 5 groups are no longer stacked in eclipsed positions, as in the forms, but are staggered, when viewed along the c axis ( Figure 6). It seems that at low temperature, the tilting of the SbF 6…”