title: Crystal structure of guanidinium hexafluoridovanadate(III), (CN3H6)3[VF6]: an unusual hybrid compound related to perovskite.
abstract: 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 Pa-3), exhibiting isolated regular VF6octahedral units, which are hydrogen bonded to protonated guanidinium moieties. Although the VF6octahedral 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.
authors.affiliation: School of Chemistry, EaStCHEM, University of St Andrews, KY16 9ST, Scotland.
authors.forename: Cameron
authors.initials: C
authors.lastname: Black
authors.affiliation: School of Chemistry, EaStCHEM, University of St Andrews, KY16 9ST, Scotland.
authors.forename: Philip
authors.initials: P
authors.lastname: Lightfoot
keywords: crystal structure; guanidinium; hexafluoridovanadate(III); hybrid perovskite; octahedral tilt; perovskite; supramolecular array