Sodium trifluoromethanesulfonate acetonitrile solvate

Abstract

In the structure of the title salt, Na+·CF3SO3−·C2H3N, two symmetry‐related acetonitrile molecules take part in the octa­hedral coordination of the Na+ cation, which is located on an inversion center. The trifluoromethanesulfonate anions and acetonitrile molecules lie on mirror planes. The Na+ ions are arranged in layers, sandwiched by trifluoro­methane­sulfonate double layers with the lipophilic CF3 groups pointing outwards and towards those of neighbouring double layers.

Electrochemical Film Formation on Magnesium Metal in an Ionic Liquid That Dissolves Metal Triflate and Its Application to an Active Material with Anion Charge Carrier

“…Meffre et al analyzed the crystal structure of the NaCF 3 SO 3 -AN adduct. 21 Similar to the role of the MCF 3 SO 3 -AN adduct (M: Li or Na), we propose a polymeric networking model for CF 3 SO 3 anions (Figure 7). For the film in the NaCF 3 SO 3 -DEME + TFSA − system, CF 3 SO 3 − anions first migrate toward and adhere to the Mg anode, some of the adhered CF 3 SO 3 − anions cleave the bonding of SO units, and the opened single bonds react with Na + or Mg 2+ .…”

“…The AN molecule acted as an electron donor to elemental Li. Meffre et al analyzed the crystal structure of the NaCF 3 SO 3 -AN adduct . Similar to the role of the MCF 3 SO 3 -AN adduct (M: Li or Na), we propose a polymeric networking model for CF 3 SO 3 anions (Figure ).…”

“…Sodium (Na) is an alkali metal with a reduction potential of −2.71 V vs the standard hydrogen electrode (SHE). Na has a high coordination structure in some compounds; 21 therefore, Na + may be involved in electrochemical film formation on the Mg plate, despite having a lower reduction potential than Mg 2+ /Mg (−2.37 V vs SHE). Cerium (Ce) is a rare metal with a reduction potential of Ce 3+ /Ce (−2.32 V vs SHE), which is very close to that of Mg 2+ /Mg (−2.37 V vs SHE).…”

The charge flipping algorithm

“…This is a good general technique but today we know that the clean-up procedure would do an even better job at the end of a single run, and the option of using multiple runs would still be open. Since then, several unknown structures have successfully been solved by charge flipping (Meffre et al, 2007;Richeter et al, 2007; Lee & Astier, 2007; but, as current direct-methods programs perform so well, using the CF method remained mostly a curiosity.…”