Hydrothermal synthesis and crystal structure of a layered vanadium oxide with an interlayer metal co-ordination complex: Cd[C₃N₂H₁₁]₂[V₈O ₂₀]

The compound Cd[C₃N₂H₁₁]₂[V₈O ₂₀] was synthesized from the hydrothermal reactions of V₂O₅, CdSO₄, 1,2-diaminopropane (enMe) and water in the molar ratio 1:1:2.2:223. Its structure has been determined by single-crystal X-ray diffraction. This compound has an open three-dimensional framework structure consisting of [V₈O₂₀]^4- layers, composed of equal numbers of VO₄ tetrahedra and VO₅ pyramids connected by both corner and edge sharing. The Cd[enMeH]₂⁴⁺ complex occupies the interlayer space and connects with the vanadium oxide layers through four Cd-O bonds. This arrangement gives one-dimensional channels with 10-membered rings along the c axis.