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相关概念视频

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...
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...
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
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...
Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.

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相关实验视频

Updated: Jul 6, 2026

Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics
13:58

Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics

Published on: September 28, 2016

甲基丁 ((t) Bu (((2) MeSi) ((4) Si(4):一种新型的过渡金属复合物的联结体.

Kazunori Takanashi1, Vladimir Ya Lee, Tadahiro Matsuno

  • 1Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.

Journal of the American Chemical Society
|April 21, 2005
PubMed
概括
此摘要是机器生成的。

研究人员合成了一种新型的阳离子复合物,其中含有四环丁连接体. 这种突破性的有机化合物,只含有较重的14组元素,扩大了循环丁化学的范围.

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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
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)
10:42

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

Published on: December 29, 2016

相关实验视频

Last Updated: Jul 6, 2026

Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics
13:58

Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics

Published on: September 28, 2016

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)
10:42

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

Published on: December 29, 2016

科学领域:

  • 有机金属化学 有机金属化学
  • 化学 化学
  • 协调化学 协调化学

背景情况:

  • 循环丁联体在有机金属化学中至关重要,但它们更重的同类较少被探索.
  • 新型连接体系统的合成和表征对于推进协调化学至关重要.
  • 有机化合物为连接体设计提供独特的电子和硬质性质.

研究的目的:

  • 为了合成和表征一种新型的阴离子复合物与一个四环丁连接体.
  • 为了研究合金复合体中的四环丁联体的结构特征.
  • 探索更重的14组元素在形成环丁类联结物的潜力.

主要方法:

  • 通过[R4Si4]2-.2K+与CpCo(CO)2.2的反应合成阳离子复合物[(R4Si4) Co(CO) 2) -.K+ (R = SiMe tBu2) 的合成.
  • 复合物的X射线衍射分析以确定其精确的分子结构.
  • 用不同的 counterions 和复合剂制备自由离子和二极体形式.

主要成果:

  • 成功合成了阳离子四环丁丁复合物.
  • X射线分析揭示了一个平面,矩形Si4环与在平面上的silyl替代物.
  • 证明四环丁片段是的新连接体类型,这是第一个只有较重的14组元素的环丁类型.

结论:

  • 甲基丁联体代表了有机金属化学中的新型结构图案.
  • 这项研究提供了第一个完全由较重的14组元素组成的环丁联体的例子.
  • 这些发现为探索协调复合体中的较重元素化学开辟了新的途径.