title: Tetra-kis(2-amino-4-methyl-pyridinium) cyclo-tetra-μ(2)-oxido-tetra-kis-[dioxido-vanadate(V)] tetra-hydrate.
abstract: The asymmetric unit of the title compound, (C(6)H(9)N(2))(4)[V(4)O(12)]·4H(2)O, contains half of a [V(4)O(12)](4-) anion, two 2-amino-4-methyl-pyridinium, (2a4mpH)(+), cations and two water mol-ecules. One water mol-ecule is disordered over two sets of sites with equal occupancies and the H atoms for this mol-ecule were not included in the refinement. The cation lies on an inversion center with four tetra-hedral VO(4) units each sharing two vertices, forming an eight-membered ring. In the crystal, the components are linked by inter-molecular N-H⋯O hydrogen bonds, forming a one-dimensional network along [100]. Further stabilization is provided by weak inter-molecular C-H⋯O hydrogen bonds. In addition, π-π stacking inter-actions with centroid-centroid distances of 3.5420 (18), 3.7577 (18) and 3.6311 (19) Å are observed.
authors.forename: Masoumeh
authors.initials: M
authors.lastname: Tabatabaee
authors.forename: Ghasem
authors.initials: G
authors.lastname: Ahadiat
authors.forename: Krešimir
authors.initials: K
authors.lastname: Molčanov
references.citation: Acta Crystallogr C. 2002 Sep;58(Pt 9):m464-5
references.pmid: 12205371
references.citation: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references.pmid: 18156677