Der Einkristallstrukturanalyse bei —173 °C zufolge kristallisiert α‐NaSO3CF3 triklin in der Raumgruppe P1¯ mit den Gitterparametern a = 9, 6592(11), b = 11, 1752(12), c = 11, 2768(12) Å, α = 101, 878(2)°, β = 105, 292(2)°, γ = 110, 501(3)°, bei Raumtemperatur (22 °C) ergeben sich die Werte a = 9, 81304(18), b = 11, 3179(2), c = 11, 5910(2) Å, α = 102, 066(2)°, β = 105, 634(2)°, γ = 110, 205(2)° (Synchrotron‐Pulverdaten). In der Kristallstruktur liegen Doppelschichten aus Triflatanionen vor, in denen die unpolaren CF3‐Gruppen einander zugewandt sind. Die Natriumatome besetzen fünf verschiedene kristallographische Lagen. α‐NaSO3CF3 ist ein fester Elektrolyt, dessen spezifische Leitfähigkeit im Bereich von 1, 75·10—8 Ω—1cm—1 bei 140 °C bis 8, 78·10—6 Ω—1cm—1 bei 237 °C liegt.

No abstract

The crystal structures of divalent metal salts of trifluoromethyl sulfonic acid ("trifluoromethyl sulfonates") M(SO(3)CF(3))(2) (M = Mg, Ca, Ba, Zn, Cu) were determined from high-resolution X-ray powder diffraction data. Magnesium, calcium and zinc trifluoromethyl sulfonate crystallize in the rhombohedral space group R(bar)3. Barium trifluoromethyl sulfonate crystallizes in the monoclinic space group I2/a(C2/c) and copper trifluoromethyl sulfonate crystallizes in the triclinic group P(bar)1. Within the crystal structures the trifluoromethyl sulfonate anions are arranged in double layers with the apolar CF(3) groups pointing towards each other. The cations are located next to the SO(3) groups. The symmetry relations between the different crystal structures have been analysed.

The high temperature modification of lithium triflate (γ-LiSO 3 CF 3 ) crystallises in the orthorhombic space group Cmca with the lattice parameters a ϭ 6.3022(4), b ϭ 8.6989 (5), and c ϭ 20.1262(14) Å (synchrotron powder diffraction data, T ϭ 456 K). The crystal structure of γ-LiSO 3 CF 3 is disordered, in the cationic as well as the anionic partial structure, and exhibits double layers of triflate anions with the lipophilic CF 3 -groups facing each other.

Ions in motion: Three different anion motions are possible for the trifluoromethyl sulfonate anion in sodium trifluormethyl sulfonate (NaSO3CF3): the CF3 reorientation, the SO3 reorientation, and a pseudo‐isotropic reorientation of the complete anion (see picture). Using 17O, 19F, and 23Na solid‐state nuclear magnetic resonance methods, these anion reorientations and the cation dynamics in NaSO3CF3 were studied.