Tris(2-ethylamino)amine (tren) as template for the elaboration of fluorides: synthesis and crystal structures of [(C2H4NH3)3NH].[Zr3F16(H2O)], [(C2H4NH3)3N]2.[ZrF6].[Zr2F12] and [(C2H4NH3)3N].[TaF7].F

Using tris(2-ethylamino)amine (tren) as a template, three new fluorides are obtained by solvothermal synthesis: [(C2H4NH3)3NH].[Zr3F16(H2O)] (I), [(C2H4NH3)3N]2.[ZrF6].[Zr2F12] (II) and [(C2H4NH3)3N].[TaF7].F (III). The structure determinations are performed by single crystal technique. The structure of I consists of infinite spiral-like [Zr3F16(H2O)]4- chains connected by tetraprotonated [trenH4]4+ cations which possess a plane configuration. In II, isolated [ZrF6] octahedra or [Zr2F12] dimers are linked to organic cations by a tridimensional hydrogen bond network. In III, [TaF7]2- monocapped trigonal prisms and 'isolated' fluoride ions are connected by hydrogen bonds to template moieties. In II and III, every organic moiety is triprotonated [trenH3]3+ with a 'spider' configuration. In the tantalum phase, the hydrogen bond network leads to the formation of a layered structure