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

摘要

Using tris(2-ethylamino)amine (tren) as a template, three new fluorides are obtained by solvothermal synthesis: [(C2H4NH3)(3)NH].[Zr3F16(H2O)] (I), [(C2H4NH3)(3)N](2).[ZrF6].[Zr2F12] (II) and [(C2H4NH3)(3)N].[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 [trenH(4)](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 [trenH(3)](3divided by). with a "spider" configuration. In the tantalum phase, the hydrogen bond network leads to the formation of a layered structure. (C) 2004 Elsevier Inc. All rights reserved.