Hydrothermal synthesis and crystal structure of a new inorganic/organic hybrid of scandium sulfate: (H2en)Sc2(SO4)4·(H2O)0.72

The first organically templated layered structure of scandium sulfate, (H2en)Sc2(SO4)4·(H2O)0.72, (en=ethylenediamine) was synthesized by a hydrothermal method and characterized by single crystal X-ray diffraction. In the title compound, scandium ions are bridged by sulfate groups with a ratio of 1:2 into a 436 layer structure. These layers are parallel packed and separated from each other by ethylenediammonium dications and water molecules. The title compound crystallizes in the monoclinic space group P2/c, with cell parameters image, image, image, image, image and image. Refinement gave R1[I>2σ(I)]=0.0354 and wR2[I>2σ(I)]=0.0878. Thermogravimetric analysis indicates that this material is thermally stable to above 400 °C.