{[(NH_4)(18-冠-6)][Bi(NCS)Cl_3]}_n的合成及结构

Synthesis and Structure of {C(NH4)(18-Crown-6)][Bi(NCS)Cl3)]}n

用凝胶法合成了标题配合物,并进行了元素分析、红外光谱、质谱及差热-热重等物性表征;用四圆衍射仪测定了它的晶体结构。晶体属三斜晶系、空间群P1,晶胞参数α=9.097(2),ι=15.754(3),(?)=16.556(2),(?)=88.08(1)°,(?)=81.29(1)°,(?)=86.62(2)°Z=2。结构分析表明,该配合物中冠醚与铵离子形成配阳离子;铋(Ⅲ)由硫氰酸根和氯离子配位,并以配体桥联形成链状聚合的配合阴离子,配合阴、阳离子主要以静电吸引形成配合物。

This paper reports on the synthesis of the title compound by means of using gel method. The compound was characterized by elemental analysis, IR, MS and differential thermal-thermal gravimetric analysis. Using a four cycle diffractometer determined the crystal structure.The crystal belongs to the triclinic system and the space group is P1 with cell parameters, α = 9. 097(2) A, 6=15.754(3) A, c= 16.556(2) A, α = 88.08 (1)°, β = 81.29(1)°, γ = 86.62(2)°, Z = 2. The result of crystal structure analysis shows that the 18-crown-6 coordinates with ammonium to form cation and the Bi(Ⅲ) is coordinated by thiocynates and chloride ions to form a polymeric negative ion chain.