[H_2N(CH_2CH_2)_2O]_3[Cr(OH)_6Mo_6O_(18)]·6H_2O的合成及晶体结构

Synthesis and Crystal Structure of Anderson-type Polyoxometalate:[H_2N(CH_2CH_2)_2O]_3[Cr(OH)_6Mo_6O_(18)]·6H_2O

应用常温水溶液方法,合成了1个吗啉分子为抗衡阳离子的多酸化合物[H2N(CH2CH2)2O]3[Cr(OH)6Mo6O18]·6H2O,用X-射线单晶衍射、元素分析、红外光谱和热重对晶体结构进行了表征.该晶体属于三斜晶系,P-1空间群,a=0.793 85(6)nm,b=1.370 67(11)nm,c=1.984 58(16)nm,α=70.037 0°,β=80.392 0(10)°,γ=77.229 0(10)°,V=1.969 6(3)nm3,Z=2,R1=0.068 3,wR2=0.193 4.在该晶体结构中,Anderson结构多阴离子簇、抗衡阳离子吗啉阳离子以静电引力结合,并交错排列.

A new Anderson-type polyoxometalate[H2N（ CH2CH2）2O]3[Cr（ OH）6Mo6O18]·6H2O has been synthesized characterized by single crystal X-ray diffraction,IR spectra,and Thermogravimetric analysis（ TGA）. Crystal data： Triclinic space group P-1,a = 0. 793 85（ 6） nm,b = 1. 370 67（ 11） nm,c = 1. 984 58（ 16） nm,α = 70. 037 0°,β = 80. 392 0（ 10） °,γ = 77. 229 0（ 10） °,V = 1. 969 6（ 3） nm3,Z = 2,R1= 0. 0683,wR2 = 0. 193 4. The single-crystal X-ray analysis reveals that the compound is composed of Anderson-type[Cr Mo6O24H6]3-,[H2N（ CH2CH2）2O]＋ cations,and isolated water molecules.