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相关概念视频

Valence Bond Theory02:45

Valence Bond Theory

Overview of Valence Bond Theory
Ionic Crystal Structures02:42

Ionic 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...
Metallic Solids02:37

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
Coordination Number and Geometry02:57

Coordination Number and Geometry

For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
Structural Isomerism02:34

Structural Isomerism

Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
Valence Bond Theory02:42

Valence Bond Theory

Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...

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Updated: Jun 29, 2026

Synthesis of Nine-atom Deltahedral Zintl Ions of Germanium and their Functionalization with Organic Groups
08:15

Synthesis of Nine-atom Deltahedral Zintl Ions of Germanium and their Functionalization with Organic Groups

Published on: February 11, 2012

Sn12(2-): 斯坦纳斯菲伦 (Sn12(2-): 斯坦纳斯菲伦.

Li-Feng Cui1, Xin Huang, Lei-Ming Wang

  • 1Department of Physics, Washington State University, 2710 University Drive, Richland, WA 99354, USA.

Journal of the American Chemical Society
|June 29, 2006
PubMed
概括
此摘要是机器生成的。

一个新的锡集群,stannaspherene,表现出了显著的稳定性和对称性. 这种独特的结构可以封装过渡金属,为纳米材料创造新的构建模块.

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The Synthesis of [Sn10(Si(SiMe3)3)4]2- Using a Metastable Sn(I) Halide Solution Synthesized via a Co-condensation Technique
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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)
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相关实验视频

Last Updated: Jun 29, 2026

Synthesis of Nine-atom Deltahedral Zintl Ions of Germanium and their Functionalization with Organic Groups
08:15

Synthesis of Nine-atom Deltahedral Zintl Ions of Germanium and their Functionalization with Organic Groups

Published on: February 11, 2012

The Synthesis of [Sn10(Si(SiMe3)3)4]2- Using a Metastable Sn(I) Halide Solution Synthesized via a Co-condensation Technique
12:43

The Synthesis of [Sn10(Si(SiMe3)3)4]2- Using a Metastable Sn(I) Halide Solution Synthesized via a Co-condensation Technique

Published on: November 28, 2016

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)
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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)

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科学领域:

  • 无机化学 无机化学
  • 材料科学 材料科学 材料科学
  • 纳米技术 纳米技术

背景情况:

  • 探索新型集群化合物对于推进材料科学至关重要.
  • 了解金属集群的结合和结构性质,可以为新纳米材料的设计提供信息.

研究的目的:

  • 报告发现和描述一个稳定的锡集群,称为stannaspherene.
  • 为了研究电子结构和粘合在stannaspherene内的.
  • 在纳米材料合成中探索stannaspherene作为过渡金属宿主的潜力.

主要方法:

  • 使用计算建模和理论分析来研究Sn122-集群.
  • 对结合的分析包括检查非定位的辐射PI键和球体上的SIGMA键.
  • 该研究评估了icosahedral的结构稳定性和内部体积.

主要成果:

  • Sn122-集群,stannaspherene,被确定为一个高度稳定的和对称的二面体.
  • 子是通过四个非定位的辐射π键和来自Sn 5p轨道的九个非定位的球体上西格玛键稳定.
  • 斯坦纳斯烯的直径为6.1 Å,具有显著的内部空隙,能够容纳过渡金属原子.

结论:

  • 斯坦纳斯烯代表了一种具有独特结构和电子性质的新型稳定金属集群.
  • 斯坦纳斯烯封装过渡金属的能力使其成为集群组装纳米材料的有希望的内分体构建块.
  • 这一发现为开发具有定制性质的先进纳米材料开辟了道路.