摘要
2-硝基-4-甲基苯胂酸分子中的胂酸基能与稀土元素络合显色,是合成重要显色剂的反应中间体。了解它的结构,对设计合成路线、研究反应机理以及探索稀土元素的分析方法有着十分重要的意义。本文报道2-硝基-4-甲基-苯胂酸多晶样品X射线衍射数据,利用改进的尝试法将所有衍射数据指标化。该方法亦适用于六方、四方、正交、单斜和三斜物质粉末衍射数据的指标化。
The X-ray diffraction values of powder crystal specimens of unknown crystal system of 2-nitro-4-methylphenylarsonic acid were indexed successfully by the improved trial-and-error method. This method is also suitable for indexing for powder diffraction values of hexagonal, tetragonal, or-thorhombic, monoclinic and triclinic substance. The lattice parameters obtained from the powder diffraction values were refined by the least-square method. Indexing of the powder diffraction data and refinement of the unit-cell parameters for 2-nitro-4-methylphenylarsonic acid are reported. The refined crystallographic data are:C7H8NO5As, 10-C2h1-P2/m(approximately). a= 10. 466(8) A, b = 8. 389(2) A , c=9. 918(3) A, β=95. 08(3)°, Z=4, Dm=1. 970, Dx= 1. 999 g.cm-3. The quantitative figure of merit(FN) is F20=27.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1989年第10期1053-1055,共3页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
