Abstract
The title compound, (C8H22N2O)2[Mo8O26]·H2O, (cis-H2 L)2[β-Mo8O26]·H2O, where L = (bis[2-N,N-dimethylamino)ethyl] ether), was synthesized from bis[2-(dimethylamino)ethyl] ether and MoO3 under solvothermal conditions and characterized by multinuclear NMR and single-crystal X-ray diffraction techniques. The structure displays two [oxybis(ethane-1,2-diyl)]bis(dimethylammonium), or [cis-H2 L]2+, cations, a central [β-Mo8O26]4− anionic cluster consisting of eight distorted MoO6 octahedra, and two water molecules in their deuterated form. The central anion lies across an inversion center. The [cis-H2 L]2+ cations are hydrogen bonded to the central [β-Mo8O26]4− cluster via bridging water molecules. In the crystal, O—H...O hydrogen bonds link the components into chains along [010]. Weak C—H...O hydrogen bonds link these chains into a three-dimensional network.
Highlights
The title compound, (C8H22N2O)2[Mo8O26]ÁH2O,2[ -Mo8O26]ÁH2O, where L =ethyl] ether), was synthesized from bis[2(dimethylamino)ethyl] ether and MoO3 under solvothermal conditions and characterized by multinuclear NMR and single-crystal X-ray diffraction techniques
The structure displays two [oxybis(ethane-1,2-diyl)]bis(dimethylammonium), or [cis-H2L]2+, cations, a central [ -Mo8O26]4À anionic cluster consisting of eight distorted MoO6 octahedra, and two water molecules in their deuterated form
Weak C—HÁ Á ÁO hydrogen bonds link these chains into a three-dimensional network
Summary
Polyoxometalates (POMs) are self-assembled metal clusters finding broad application in coatings, the pulp and paper industry, catalysis, microelectronics, and medicine (Katsoulis, 1998; Chaidogiannos et al, 2004; Long et al, 2007; Rhule et al, 1998). Group 5 and 6 POMs are more common and can adopt a wide range of nuclearity (Pope, 1983; Pope & Muller, 1991). We report the isolation of the title compound (1), which is characterized by a protonated bis(dialkyl)ammonium ether salt linked to an octamolybdate anion through hydrogen bonding (Table 1). Compound (1) (Fig. 1) crystallizes as a salt containing two [bis(2-N,N-dimethylammonium)ethyl ether]2+ cations and a [ -Mo8O26]4À anion hydrogen bonded through a single water molecule (deuterated)of hydration per [H2L]2+.
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