[Na(DB24C8)]3[α-AsMo12O40]·9H2O超分子的合成与晶体结构

The complex of [Na(DB24C8)]₃[α-AsMo₁₂O₄₀]·9H₂O was synthesized by hydrothermal techniques and cha-racterized by IR and X-ray diffraction analysis. Single crystal X-ray diffraction indicate that this complex is belong to monoclinic, space group P2₁/n with cell dimension: a=1.480 3(7) nm, b=2.692 7(3) nm, c=3.046 6(4) nm, α=90.00°, β=95.4120(10)°, γ=90.00°. V=12.090 28 nm³, Z=4, F(000)=6 440.0, R=0.050 9, wR₂=0.113 5. The crown ethers just coordinate with Na⁺ and have no direct interaction with the polyoxometalate, because the crown ethers have a contorted configuration. CCDC: 626686.     

[Na(DB18C6)(CH3CN)]2W6O19·(CH3CN)2的合成、晶体结构及谱学表征

A super-molecular complex, [Na(DB18C6)(CH₃CN)]₂W₆O₁₉·(CH₃CN)₂, was obtained by solvothermal reaction and characterized by IR , ¹H NMR, gumbc spectrum single crystal and X-ray diffraction. The compou- nd crystallizes in monoclinic space group P2₁/c with a=1.185 22(4) nm, b=2.091 51(8) nm, c=1.487 19(5) nm, β=117.467(2)° and Z=2. The complex contains four basic units: Na⁺, CH₃CN, DB18C6 and W₆O₁₉^2-. Sodium ions located in the cavity of dibenzo-18-crown-6 with 6 Na-O bonds and the crown ether-sodium ion complex is supported on the terminal oxygen atoms of the typical Lindqvist isopolyanion W₆O₁₉^2- via the coordinative interactions. W₆O₁₉^2- located between two DB18C6 and led to the formation of the “hamburger” structure. Two isolated CH₃CN are included in the complex. The whole title crystal is stabilized by van der waals force. CCDC: 292369.