[(CH_3)_2NH_2]_3[HSiMo_(12)O_(40)]·2DMF·4H_2O的合成和晶体结构

Preparation and Crystal Structure of the Charge-transfer Complex [(CH_3)_ 2NH_2]_ 3[ HSiMo_(12)O_ (40)]·2DMF·4H_ 2O

以硅钼酸和N ,N 二甲基甲酰胺 (DMF)为原料 ,在乙腈和水的混合溶剂中 ,制得 [(CH3 ) 2 NH2 ]3 [HSiMo12 O40 ]·2DMF·4H2 O ,测定了化合物的晶体结构。结果表明 ,晶体属三斜晶系 ,P墿空间群 ,晶胞参数 :a =1 2 10 1(2 )nm ,b =1 4 986 (3)nm ,c =1 4 992 (3)nm ,V =2 6 94 9(9)nm3 ,Z =2 ,R =0 0 310 ,Dc=2 6 83g/cm3 。结构分析表明 ,化合物分子由 1个杂多阴离子 ,3个质子化的二甲胺 ,2个二甲基甲酰胺分子和4个结晶水分子组成。

A charge-transfer complex, \[(CH 3) 2NH 2\] 3\[HSiMo 12O 40\]·2DMF·4H 2O, has been synthesized and characterized. The crystal structure of the complex obtained in mixed solvent of acetonitrile and water has been determined by single crystal X-ray diffractometry. It is triclinic lattice, space group Pī, with a= 1.210 1(2) nm, b=1.498 6(3) nm, c=1.499 2(3) nm, α=83.59(3)°, β=86.88(3)°, γ= 87.09(3)°, V=2.694 9(9) nm 3, D c=2.683 9 g/cm 3, Z=2 and R=0.031 0.