Abstract
An inorganic compound formulated as K-3.31(NH4)(0.69)[Se2Mo5O21]center dot 2H(2)O has been synthesized by conventional solution method and characterized by scanning electron microscopy, IR, UV-Vis spectroscopies behaviors. The structure of the title compound has been determined from a single-crystal X-ray diffraction. It crystallizes in the monoclinic space group P2(1)/n, with a = 9.9371(2) , b = 23.3545(2) , c = 10.5179(2) , beta = 114.12(3)A degrees, V = 2227.7(5) (3) and Z = 4. It was revealed that the Strandberg-type polyoxoselenomolybdate cluster can be considered as a ring formed by five distorted edge- and corner-sharing MoO6 octahedra, capped on both poles by a selenate pyramids sharing three vertices with the ring molybdenum centers. The Strandberg clusters are connected with ammonium ions and water molecules through hydrogen-bonding interactions which ensure the cohesion of the structure into a three-dimensional network.