摘要
在乙腈溶剂中,获得了La(NO)_3与穴醚(2.2)配合物的单晶,测定了晶体结构。结果表明La^(3+)在穴醚空穴中呈无序状态分布,即有种3种不同位置。La(NO_3)_3·(C_(12)H_(26)O_4N_2)晶体属三斜晶系,空间群为P_1^-,晶胞参数为a=8.183(2)(?),b=10.958(4)(?),c=13.948(4)(?);α=99.46(3)°,β=78.01(2)°,γ=98.68(3)°;V=1197.98(?)~3,Z=2。讨论振动光谱(红外及拉曼)在配位过程中的变化。
The single crystal of the complex of lanthanum nitrate with tetraoxadiaza macro cycle was obtained in the methyl cyanide. Its crystal and molecular structures have been determined. The results show that the La3+ is in disoder state in the hole of tetraoxadiaza macrocycle [cryptand(2.2)] and there are three positions in it. The complex crystallizes in triclinic system with space group P1-. The unit cell parameters are as follows, a=8.183(2)A, b=10.958(4)A, c=13.948(4)A, α=99.46(3)°,β=78.01(2)°, γ=98.68(3)°, V=1197.98A3, Z=2. The changes of vibrational spectra of cryptand (2.2) due to complex formation of the cryptand (2.2) with La3+ are discussed.
出处
《北京大学学报（自然科学版）》
CAS
CSCD
北大核心
1991年第4期452-459,共8页
Acta Scientiarum Naturalium Universitatis Pekinensis
基金
国家自然科学基金
关键词
硝酸镧
穴醚
配合物
晶体结构
稀土
Crystal structure
Rare-earth
Cryptate
Syntheses
Vibrational spectra
