摘要
锕系元素冠醚配合物中,研究得最多的是铀酰与冠醚形成的配合物,以往的工作主要集中在配合物的合成及性质研究方面,而对其结构很少研究。迄今为止,只测定过硝酸铀酰与18-冠-6配合物的晶体结构,铀酰与其它种类冠醚形成的配合物的结构文献中还未见报道。我们在乙腈溶液中培养出硝酸铀酰与苯并-15-冠-5的配合物[UO_2(NO_3)_2(H_2O)_2]·(B15C5)单晶,并研究该配合物的晶体及分子结构。
The title complex crystallizes in triclinic, space group P1 with Z = 2. Lattice parameters are:a=8.468(2),b=8.787(2),c=16.674(4)A,α=74.91(4)°,β=82.45(3)°,γ=69.84 (2)°, V=1123. 4 A3. The structure was solved by Patterson and Fourier techniques and refined by full-matrix least-squares to R=0. 032 based on 4300 observed reflections. The linear uranyl group is perpendicular to a equatorial plane formed by six oxygen atoms, of which two from two water molecules, four from two bidentate nitrate groups. The coordination polyhedron takes a slight distored hexagonal bipyramid arrangement. The neutral UO2(NO3)2(H2O)2 units connect with crown ether by hydrogen bonding through intermediary water molecules.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1989年第10期1047-1049,共3页
Chemical Journal of Chinese Universities
基金
国家教育委员会科学基金
关键词
铀配合物
硝酸铀酰
冠醚
晶体结构
Uranyl nitrate, Benzo-15-crown-5, Complex, Crystal structure
