Hydrothermal Synthesis and Crystal Structure of Complex [H_3DETA]_3[H_2DETA]_2[Pr(SiW_(11)O_(39))_2]·2H_2O

The title compound was prepared by hydrothermal synthesis and characterized by single crystal X-ray structural analysis for the first time.The compound was crystallized in triclinic,space group P1 with a=1.200 0(2) nm,b=2.026 1(4) nm,c=2.239 2(5) nm,α=111.60(3)°,β=92.92(3)°,γ=103.56(3)°;V=4.863 8(17) nm~(3),Z=2,ρ=4.152 g/cm~(3),μ=26.519 mm~(-1),F(000) = 5 374.The structure analysis shows that the Pr~(3+) ion is eightcoordinated with a distorted square anti-prismatic configuration.Moreover,the polyanions [Pr(SiW_(11)O_(39))_(2)]~(13-) and organic molecules form a large cavity through hydrogen bonding interaction.