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Updated: Jun 13, 2026

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
Published on: March 24, 2018
A new chain structure: catena-poly[4,4'-(ethane-1,2-diyl)dipyridinium bis[[aquadifluoridooxidovanadate]-mu-fluorido]]
David W Aldous1, Alexandra M Z Slawin, Philip Lightfoot
1School of Chemistry, University of St Andrews, Fife KY16 9ST, Scotland.
Abstract:
The title compound, {(C(12)H(12)N(2))[V(2)F(6)O(2)(H(2)O)(2)]}(n), features a novel extended-chain moiety, [VOF(2)F(2/2)(H(2)O)](n), comprising trans vertex-connected VOF(4)(H(2)O) octahedra. The octahedra themselves show the characteristic distortion due to the off-centering of the V(4+) ion, such that a short terminal V=O bond and an elongated trans V-OH(2) bond are present. Hydrogen bonding from the water molecules to terminal F atoms in adjacent chains generates associated chain dimers, which are loosely linked into sheets via additional hydrogen bonding involving the organic moieties. Structural relationships with previously described vanadium oxyfluoride species are briefly discussed.
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