3 years ago

Syntheses and Crystal Structures of Sodium Hydrogen Fluorides NaF·nHF (n = 2, 3, 4)

Syntheses and Crystal Structures of Sodium Hydrogen Fluorides NaF·nHF (n = 2, 3, 4)
Sergei I. Ivlev, Florian Kraus, Theresa Soltner, Antti J. Karttunen, Andreas J. Kornath, Martin J. Mühlbauer
A series of higher sodium hydrogen fluorides were synthesized and structurally characterized. Sodium tetrahydrogen pentafluoride, NaH4F5, crystallizes in space group type I41/a with cell parameters a = 6.0275(4), c = 11.6208(13) Å, V = 422.19(7) Å3, Z = 4 at 100 K. Sodium trihydrogen tetrafluoride, NaH3F4, crystallizes in space group type R3 with cell parameters a = 6.5139(4), c = 13.4040(15) Å, V = 492.55(8) Å3, Z = 6 at 100 K. Sodium dihydrogen trifluoride, NaH2F3, crystallizes in space group type Pnma with cell parameters a = 7.9276(9), b = 3.4514(3), c = 9.6937(10) Å, V = 265.23(5) Å3, Z = 4 at 100 K. The investigations were complemented by IR spectroscopy and theoretical calculations. NaH2F3 was additionally characterized by means of powder neutron diffraction. All observed F–H···F hydrogen bonds are unsymmetric, close to linearity and can be considered as strong hydrogen bonds.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/zaac.201700228

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