Synthesis and crystal structure of the Tetra-nickel substituted [Ni-4(H2O)(2)(AsW9O34)(2)](10-) polyoxoanion

摘要

The new polyoxotungstate (NH4)(6)Na-4[Ni-4(H2O)(2)(AsW9O34)(2)] (.) 20 H2O (1) was synthesized in aqueous solution and characterized by IR and UV/Vis spectroscopy, energy dispersive X-ray fluorescence and single-crystal X-ray analysis. It contains the tetra-nickel substituted [Ni-4(H2O)(2)(AsW9O34)(2)](10-) polyoxoanion, in which the four Ni atoms are in a common plane and form a regular rhombus. 1 crystallizes in the monoclinic crystal system, space group P2(1) with a = 11.849(2), b = 16.718(3), c = 21.243(4) Angstrom, beta = 100.48(3)degrees, and Z = 2. The anions are linked via hydrogen bonds and sodium cations.