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本文报道了在乙醇—氯仿混合溶剂中首次获得组份为(NaInBr_4)_2(C_(14)H_(20)O_5)_3·2H_2O的晶体配合物.用元素分析确定了其组份.通过红外光谱的研究证实配合物晶体中的阳离子与醚氧原子及水分子发生了配合作用。 用X-射线衍射法测定了配合物的晶体结构,晶体属单斜晶系,M=1755.3,a=14.393(8)A,b=28.494(9)A,c=15.191(8)A,β=96.63(5)°,V=6189A~3’,D_c=1.88g·cm~(-3),Z=4,空间群为C_(2h)~5——P2_1/n。晶体结构研究表明不对称单位中包含两个配阳离子Na~(+)(B15C5)(B15C5)代表C_(14)H_(20)O_5分子)。两个配阴离子InBr_4~-、两个H_2O分子和一个未被金属离子配合的B15C5分子。配合物的晶体结构测定结果对于阐明与该晶体相对应的萃取体系In(Ⅲ)/NaBr/B15C5—1,2C_2H_4Cl_2的萃取机理提供了理论依据。
In this paper, the crystal complexes of (NaInBr_4) _2 (C_ (14) H_ (20) O_5) _3 · 2H_2O were obtained for the first time in a mixed solvent of ethanol and chloroform. The composition of the crystal was confirmed by elemental analysis. The study confirmed that the complexation of the crystal cation and ether oxygen atoms and water molecules with the role of coordination. The crystal structure of the complex was determined by X-ray diffraction. The crystal was monoclinic with M = 1755.3, a = 14.393 (8) A, b = 28.494 (9) A, c = 15.191 = 96.63 (5) °, V = 6189A ~ 3 ’, D_c = 1.88g · cm ~ (-3), Z = 4 and space group C_2h ~ 5_2_1 / n. The crystal structure studies show that the asymmetric unit contains two cation (Na +) (B15C5) (B15C5) for C_ (14) H_ (20) O_5). Two with anion InBr_4 ~ -, two H_2O molecules and a metal ion is not B15C5 molecules. The results of the crystal structure determination of the complex provide a theoretical basis for elucidating the extraction mechanism of In (Ⅲ) / NaBr / B15C5-1,2C_2H_4Cl_2 corresponding to the crystal.