[C<sub>5</sub>H<sub>14</sub>N<sub>2</sub>][(MoO<sub>3</sub>)<sub>3</sub>(SO<sub>4</sub>)]·H<sub>2</sub>O: Sulfated α-Molybdena Chains
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Recent work in the preparation of organically templated metal sulfates under hydrothermal conditions has been extended to include the sulfation of α-molybdena through the synthesis of [C5H14N2][(MoO3)3(SO4)]·H2O. Single crystals were grown under hydrothermal conditions from molybdenum oxide, water, sulfuric acid, and an enantiomerically pure (R)-2-methylpiperazine source and characterized using both single-crystal X-ray diffraction and infrared spectroscopy. One-dimensional [(MoO3)3(SO4)]n2n- chains, based on a neutral α-molybdena backbone, are connected through an extensive hydrogen-bonding network containing [C5H14N2]2+ cations and occluded water molecules. The direction of the hydrogen bonding is primarily dictated by the nucleophilicity of the respective oxide ligands, as determined using bond valence sums.
