STRUCTURE OF LIN(CF3SO2)2, A NOVEL SALT FOR ELECTROCHEMISTRY

J L NOWINSKI, P LIGHTFOOT, P G BRUCE

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105 Citations (Scopus)

Abstract

The crystal structure of lithium bis(trifluoromethanesulfonimide) [LiN(CF3SO2)2] has been solved from X-ray powder diffraction data and refined by the Rietveld method. The salt crystallises in the orthorhombic system, space group Pnaa, a = 9.6351(2) angstrom, b = 5.4154(1) angstrom, c = 16.2639(3) angstrom. The anion, previously uncharacterised crystallographically, has two-fold symmetry around the nitrogen atom, with short [1.56(1) angstrom] S-N distances and a large S-N-S angle [129(1)-degrees]. This is consistent with other similar salts and suggests a high degree of double-bond character and delocalisation around N. Li+ is tetrahedrally coordinated by four oxygens from four neighbouring anions.

Original languageEnglish
Pages (from-to)1579-1580
Number of pages2
JournalJournal of Materials Chemistry
Volume4
Issue number10
Publication statusPublished - Oct 1994

Keywords

  • ABINITIO STRUCTURE DETERMINATION
  • POWDER DIFFRACTION DATA
  • X-RAY
  • CRYSTAL

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