Abstract
Two new divalent metal phosphonates, [Cu2{CH3C(OH)(PO3)2}(H2O)2] · 0.5H2O (1) and [NH3CH2CH2NH3][Zn3{CH3C(OH)(PO3)2}2(H2O)] · H2O (2), have been hydrothermally synthesized and characterized by single-crystal X-ray diffraction as well as with infrared spectroscopy, elemental analysis and thermogravimetric analysis. The structure of 1 comprises [Cu3(hedp)2]2− layers connected by [CuO4] units to form a 3D open-framework structure with a one-dimensional channel system along the b axis. In 2, the connections of alternately arranged [ZnO4] tetrahedra, [ZnO6] octahedra and [CPO3] tetrahedra via vertex-sharing result in a 2D layered structure. The protonated ethylenediamine cations and water molecules are located between adjacent layers.
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