Piperazine Metavanadate Trihydrate

Abstract

2H20 (Leblanc & Ferey, 1989) contain tetrahedrally coordinated V atoms. We describe here the structure of piperazine metavanadate trihydrate, (I). IH N~-~N H13-The solution of the structure of piperazine metavanadate trihydrate shows that the asymmetric unit of the crystal structure consists of a V30~-unit, which is part of a polymeric anion, two piperazine cations unequally protonated (one cation is doubly protonated and the other is singly protonated) and three molecules of water. The metavanadate anions are infinite chains of VO4 corner-sharing tetrahedra with each V atom in the centre of a tetrahedron formed by four O atoms. The V--O distances, 1.600 (4)-1.796 (4),~,, are within the range observed in other metavanadate anions. The O---V-----O angles are in the range 107.5 (2)-111.5 (2) °, and give no indication of any strong distortion of the tetrahedral environment. The CmN distances in the piperazine cations are within the range observed in the cations in ethylenediammonium vanadate (Bensch, Hug, Relier & Oswald, 1987), n-hexylammonium metavanadate (Roman, Aranzabe, Luque & Guti6rrez-Zorrilla, 1991) and 3-aza-1,5-pentamethylenediammonium metavanadate (Roman, AbstractThe structure of piperazine-l,4-diium piperazin-l-ium metavanadate trihydrate,

catena-Poly[2,2′,2′′-nitrilotris(ethanaminium) [tri-μ-oxido-tris[dioxidovanadate(V)]] monohydrate]

“…Organically templated metal oxides have been the subject of sustained interest for many years, owing to their structural diversity and potential to exhibit technologically desirable physical properties (Cheetham et al, 1999 Riou et al (1996), Roman et al (1991), Smith et al (2012), Lin et al (2003 and Tyrselová et al (1995). However, the chain topology of the inorganic anion in the title compound is…”

2-(2,3-Diphenylpiperazin-1-yl)ethylammonium chloride

“…The bond lengths and angles in (I) are comparable to those observed in related piperazine derivatives (Parihar et at., 1995;Thirumurugan et at., 1998;Tyrselova et at., 1995;Okamoto et at., 1992). The torsion angle C1---C7--C12---C13 is 58.6(3) °, corresponding to a gauche conformation at C7---C12.…”