三缺位杂多阴离子α-A-PW9O349-的甲基硅衍生物(TBA)3[α-A-PW9O34(CH3SiO)3(CH3Si)]的合成和晶体结构

Reaction of the trivacant heteropolyanions α-A-PW₉O₃₄^9- with CH₃SiCl₃ leads to the formation of the organosilyl derivative (TBA)₃[α-A-PW₉O₃₄(CH₃SiO)₃(CH₃Si)]. The crystal X-ray diffraction analysis shows that the crystal belongs to orthorhombic with space group Pca2₁, M=3177.09 and the unit cell parameters: a=25.761(5)?,b=14.519(3)?,c=24.396(5)?.V=9124(3)?³,Z=4,D_c=2.225g·cm^-3,μ(MoKα)=11.438mm^-1,F(000)=5464,R=0.0561,R_w=0.0866. The anion consists of one α-A-PW₉O₃₄^9- anion linked by three CH₃SiO⁺ groups, which attached to the fourth CH₃Si through three Si-O-Si bridges.