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相关概念视频

Chemical Reactions in Aqueous Solutions03:03

Chemical Reactions in Aqueous Solutions

Chemical substances interact in many different ways. Certain chemical reactions exhibit common patterns of reactivity. Due to the vast number of chemical reactions, it becomes necessary to classify them based on the observed patterns of interaction.
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
Lewis Structures of Molecular Compounds and Polyatomic Ions02:54

Lewis Structures of Molecular Compounds and Polyatomic Ions

To draw Lewis structures for complicated molecules and molecular ions, it is helpful to follow a step-by-step procedure as outlined:
Ions as Acids and Bases02:54

Ions as Acids and Bases

Salts with Acidic Ions
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
Common Ion Effect03:24

Common Ion Effect

Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide:
Formation of Complex Ions03:45

Formation of Complex Ions

A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...

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相关实验视频

Updated: Jul 21, 2026

Reaction Kinetics and Combustion Dynamics of I4O9 and Aluminum Mixtures
09:16

Reaction Kinetics and Combustion Dynamics of I4O9 and Aluminum Mixtures

Published on: November 7, 2016

一个新的oxoanion: [IO]3-含有I(V) 在银酸酸银酸酸中具有立体化学活性单一对,Ag4(UO2)4(IO3)2(IO4)2O2

A C Bean1, C F Campana, O Kwon

  • 1Department of Chemistry, Auburn University, Auburn, Alabama 36849, USA.

Journal of the American Chemical Society
|September 6, 2001
PubMed
概括

合成了一种新的银酸化合物,Ag4(UO2)4(IO3)2(IO4) 2O2. 它的复杂结构具有相互连接的乌兰和白银多面体,具有独特的四氧化 (V) 离子影响其特性.

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Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F&#8722;
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Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−

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U2O5 Film Preparation via UO2 Deposition by Direct Current Sputtering and Successive Oxidation and Reduction with Atomic Oxygen and Atomic Hydrogen
12:05

U2O5 Film Preparation via UO2 Deposition by Direct Current Sputtering and Successive Oxidation and Reduction with Atomic Oxygen and Atomic Hydrogen

Published on: February 21, 2019

相关实验视频

Last Updated: Jul 21, 2026

Reaction Kinetics and Combustion Dynamics of I4O9 and Aluminum Mixtures
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Reaction Kinetics and Combustion Dynamics of I4O9 and Aluminum Mixtures

Published on: November 7, 2016

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F&#8722;
06:53

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−

Published on: July 27, 2018

U2O5 Film Preparation via UO2 Deposition by Direct Current Sputtering and Successive Oxidation and Reduction with Atomic Oxygen and Atomic Hydrogen
12:05

U2O5 Film Preparation via UO2 Deposition by Direct Current Sputtering and Successive Oxidation and Reduction with Atomic Oxygen and Atomic Hydrogen

Published on: February 21, 2019

科学领域:

  • 无机化学 无机化学
  • 固态化学 固态化学
  • 材料科学 材料科学 材料科学

背景情况:

  • 乌拉尼尔化合物和酸盐在核材料和催化过程中很重要.
  • 了解复杂结构有助于开发新的功能材料.

研究的目的:

  • 为了合成和表征一种新的以银为基础的酸化合物.
  • 为了阐明新材料的晶体结构和结合.
  • 为了研究它的热特性和电子结构.

主要方法:

  • 使用银源,UO3和I2O5.5的水热合成.
  • 单晶X射线衍射用于结构确定.
  • 差分扫描热量计 (DSC) 用于热分析.
  • 密度函数理论 (DFT) 用于电子结构计算.

主要成果:

  • 成功合成了Ag4 ((UO2) 4 ((IO3) 2 ((IO4) 2O2) 作为色纤维针.
  • 确定了一个复杂的3D网络结构,与相互连接的乌拉尼和银多面体.
  • 识别了具有立体化学活性单一对的四氧化 (V) 离子,由DFT证实.
  • 通过DSC通过479°C和494°C的内热体观察到明显的热行为.

结论:

  • 新型化合物Ag4 ((UO2) 4 ((IO3) 2 ((IO4) 2O2) 呈现出复杂的,相互关联的结构框架.
  • 四氧化酸 (V) 离子的几何受 Jahn-Teller 扭曲的影响,正如 DFT 所支持的那样.
  • 与其他酸相比,该化合物具有独特的热性能.