Abstract
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Highlights
The title compound, propane-1,3-diammonium tetravanadate, (C3H12N2)[V4O10], represents a second polymorph of composition -[H3N(CH2)3NH3][V4O10]
The twofold symmetry of this conformation co-operates with the vanadium oxide framework to result in a higher symmetry for the resultant crystal, viz. C2/c versus P21/n
The compound exhibits a layered crystal structure comprised of edge-sharing V1O5 square pyramids linked together via corner-sharing V2O4 tetrahedra to form continuous inorganic sheets in the ab plane. These are separated by hydrogenbonded organic cations along the c axis
Summary
The title compound, propane-1,3-diammonium tetravanadate, (C3H12N2)[V4O10], represents a second polymorph of composition -[H3N(CH2)3NH3][V4O10]. The compound exhibits a layered crystal structure comprised of edge-sharing V1O5 square pyramids linked together via corner-sharing V2O4 tetrahedra to form continuous inorganic sheets in the ab plane These are separated by hydrogenbonded organic cations along the c axis. A comparative view perpendicular to the c axis is shown, and the difference in c dimensions may be explained by the more extensive hydrogen bonding in the form (Table 2), whereby each NÐH bond acts as a donor This difference in interlayer hydrogen bonding is co-operative, with a different stacking of adjacent vanadium oxide layers, such that the vanadyl bonds of the VO5 pyramids take up aheadto-head' arrangement in the polymorph, in contrast with ahead-to-tail' con®guration in the polymorph.
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