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镧-β-苯基丙烯酸配合物的分子与晶体结构
Molecular and Crystal Structure of Tri (β-Phenylacrylato) Lanthanum
【摘要】 标题化合物,线性多聚的三(μ-β-苯基丙烯酸)镧,被合成并得到晶体.X-衍射结构分析表明[La(β-C6H5HCOO)3]为三方晶系,R3c空间群,晶体学数据:a=13.344(1)A,α=116.13(1)°V=1182.2(4)A3,Z=2,Dx=1.63g/cm3,μ=1.85mm-1,F(000)=576.573个可观察的衍射点(Ⅰ>3σ(Ⅰ)),最终偏差因子R=0.031,Rw=0.036.在每个配位单元中,La与来自六个羧酸根的九个氧原子配位.晶体结构由沿晶胞体对角线方向无限伸展的一维聚合链组成,-La-La-重合于三重轴.
【Abstract】 The title compound, linear-poly [μ-β-phenylacrylato-O,O’:O’ ) Lanthanum ], has been synthesized and determined by X-ray single-crystal diffraction. [La (β-C6H5CHCHCOO)3] crystallizes in the trigonal, space group R3c. Cell parameters are a= 13. 344 (1 ) A,a= 116. 13 (1 )°,V= 1182. 2 (4) A 3,Z= 2,Dx= 1. 63 g/cm3, μ= 1. 85mm-1,F(000) = 576. The structure was refined to an R of 0. 031 and Rw of 0. 036 for 573 observed renections. Each La atom is coordinated with nine O atoms from six carboxylato groups. The crystal structure consists of one-dimensional polymeric chains with La atoms lying on thethree-fold axis of chains at a La-La distance of 3. 991 (1) A .
【Key words】 rare earth: lanthanum; β-phenylacrylic acid; crystal structure;
- 【文献出处】 杭州大学学报(自然科学版) ,JOURNAL OF HANGZHOU UNIVERSITY(NATURE SCIENCE) , 编辑部邮箱 ,1997年01期
- 【分类号】O623
- 【下载频次】35