概括
固体四化物 (XeF4) 分子是平面的,由3DX射线分析证实. 测定 xenon-fluorine 键的平均距离为 1.92 安格斯特罗姆.
科学领域:
- 无机化学 无机化学
- 固态化学 固态化学
- 晶体学 晶体学是指结晶学.
背景情况:
- 四化 (XeF4) 是一种高贵气体化合物,具有独特的化学特性.
- 了解 XeF4 中的分子几何和结合对于预测其反应性至关重要.
研究的目的:
- 为了确定固态中四化的精确三维结构.
- 阐明 XeF4.4 的分子几何和对称性.
主要方法:
- 使用了三维X射线衍射分析.
- 结晶学数据被收集和细化以确定原子的位置.
主要成果:
- 固态中的四化物分子采用平面配置.
- 该分子的近似对称性被确定为D(4h).
- 测量到的 xenon-fluorine 键的平均距离为 1.92 ± 0.03 Å.
结论:
- 固态结构证实了四化的平面几何.
- D(4h) 对称性与围绕中央原子的正方形平面布局一致.
更多相关视频
08:15Synthesis of Nine-atom Deltahedral Zintl Ions of Germanium and their Functionalization with Organic Groups
Published on: February 11, 2012
08:44Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene
Published on: August 22, 2017
相关概念视频
02:42Ionic Crystal Structures
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
04:01VSEPR Theory and the Effect of Lone Pairs
Effect of Lone Pairs of Electrons on Molecule Geometry
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
02:27Predicting Molecular Geometry
VSEPR Theory for Determination of Electron Pair Geometries
02:52VSEPR Theory and the Basic Shapes
Overview of VSEPR Theory
01:24The Seven Crystal Systems: Overview
Crystals with various point group symmetries belong to different crystal classes, which are synonymous terms. Despite being in the same class, crystals may have distinct shapes, like cubes and octahedra. There are 32 three-dimensional point groups, all of which are systematically divided into seven crystal systems.The basic cubic crystal system, exemplified by NaCl, features orthogonal vectors (α = β = �� = 90°) of equal lengths (a = b = c). When specific requirements are not imposed on the...