Crystal structure of guanidinium hexafluoridovanadate(III), (CN3H6)3[VF6] : an unusual hybrid compound related to perovskite
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Vanadium fluorides with novel crystal–chemical features and interesting physical properties can be prepared by solvothermal synthetic routes. The title compound, guanidinium hexafluoridovanadate(III), has a cubic structure (space group Pa3), exhibiting isolated regular VF6 octahedral units, which are hydrogen bonded to protonated guanidinium moieties. Although the VF6 octahedral units are not linked directly together, there are structural similarities between this crystal structure and those of the wider family of perovskite materials, in particular, hybrid perovskites based on extended ligands such as cyanide. In this context, the octahedral tilt system of the present compound is of interest and demonstrates that unusual tilt systems can be mediated via 'molecular' linkers which allow only supramolecular rather than covalent interactions.
Black , C & Lightfoot , P 2017 , ' Crystal structure of guanidinium hexafluoridovanadate(III), (CN 3 H 6 ) 3 [VF 6 ] : an unusual hybrid compound related to perovskite ' Acta Crystallographica Section C Structural Chemistry , vol Early View . DOI: 10.1107/S2053229617001711
Acta Crystallographica Section C Structural Chemistry
Copyright 2017 International Union of Crystallography. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1107/S2053229617001711
The authors thank the EPSRC for a DTA studentship to CB. Funding for this research was provided by: EPSRC (award No. EP/P505097/1).
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