HYDROTHERMAL SYNTHESIS AND SINGLE-CRYSTAL STRUCTURAL CHARACTERIZATION OF V2O4(C6H5ASO3H).H2O

The layered compound V2O4(C6H5AsO3H)•H2O has been prepared by hydrothermal synthesis and characterized by single-crystal X-ray diffraction. The structure is monoclinic, space group P21/c (No. 14) with a = 12.074 (4) Å, b = 9.574 (3) Å, c = 9.872 (2) Å, β = 107.63 (2)°, and Z = 4 and is formed of undulating layers of vanadium, oxygen, and arsenic atoms with phenyl groups directed into the interlayer space. The phenyl groups from adjacent layers interpenetrate to form a monolayer of organic groups between the inorganic sheets, resulting in a layer repeat distance (d100) of 11.507 (4) Å. The layers contain edge-shared pairs of V5+O5 square pyramids connected through corners to V4+O6 octahedra. The phenylarsonate moiety includes a terminal hydroxyl group that is hydrogen bonded to an oxygen atom of the vanadium oxide framework. The magnetic susceptibility displayed by the new compound follows the Curie-Weiss law in the temperature range 50-350 K, with reduced susceptibility due to antiferromagnetic coupling at temperatures below 50 K. © 1990, American Chemical Society. All rights reserved.