Ammonium hexafluorosilicate salts

Brandon D. Conley, Burl C. Yearwood, Sean Parkin, David A. Atwood

Research output: Contribution to journalArticlepeer-review

41 Scopus citations


The preparation and characterization of the ammonium hexafluorosilicate salts, 2[R]+ [SiF6]2- (where R = piperidinium (2), methylammonium (3), quinolinium (4), acridinium (5), 2,2,6,6-tetramethylpiperidinium (6), and propylammonium (7) is described. The salts were prepared from the reaction of the corresponding alkylammonium fluoride with silica gel. The compounds were characterized by NMR, IR, mass spectrometry and in the case of 1 (piperidinium fluoride), 2-4 by X-ray crystallography. Compounds 1-3 crystallize in the orthorhombic crystal system (space groups Iba2, Fdd2, and Pnnm, respectively), with Z = 8, 14, and 4, respectively. Compound 4 crystallizes in the triclinic space group P-1, with Z = 2. Compounds 1-4 exhibit hydrogen bonding.

Original languageEnglish
Pages (from-to)155-160
Number of pages6
JournalJournal of Fluorine Chemistry
Issue number2
StatePublished - Jun 28 2002


  • Alkylammonium
  • Fluoride
  • Hexafluorosilicate
  • Hydrogen bonding
  • NMR
  • X-ray

ASJC Scopus subject areas

  • Biochemistry
  • Environmental Chemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry


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