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Related Concept Videos

Metallic Solids02:37

Metallic Solids

21.3K
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....
21.3K
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

945
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
945
Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

2.0K
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.
2.0K
Stereoisomerism02:52

Stereoisomerism

14.5K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
14.5K
Properties of Transition Metals02:58

Properties of Transition Metals

30.6K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
30.6K
Structural Isomerism02:34

Structural Isomerism

22.4K
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...
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Using Polystyrene-block-polyacrylic acid-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization
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Polystannanes: processible molecular metals with defined chemical structures.

Walter Caseri1

  • 1Eidgenössische Technische Hochschule (ETH) Zürich, Department of Materials, Vladimir-Prelog-Weg 5, 8093 Zürich, Switzerland. walter.caseri@mat.ethz.ch.

Chemical Society Reviews
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Polystannanes are unique organometallic polymers featuring a backbone of covalently bound tin atoms. This review details their synthesis, properties, and processing into advanced materials like films and blends.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Organometallic Chemistry

Background:

  • Polystannanes represent a unique class of inorganic polymers, specifically organometallic polymers.
  • They are characterized by a backbone composed of covalently bound metal atoms, a feature not commonly observed in other polymers.

Purpose of the Study:

  • To provide a comprehensive review of polystannanes.
  • To cover their synthesis, characterization, properties, and processing.

Main Methods:

  • Review of existing literature on polystannane synthesis.
  • Analysis of spectroscopic characterization techniques, including (119)Sn NMR and UV-vis spectroscopy.
  • Examination of physical and material properties, including processing into films and fiber blends.

Main Results:

  • Polystannanes are the only characterized polymers with a metal-atom backbone.
  • Detailed insights into their synthesis pathways and structural characterization.
  • Understanding of their physical and material properties, enabling processing into functional forms.

Conclusions:

  • Polystannanes are a distinct and promising class of organometallic materials.
  • Their unique backbone structure offers potential for novel applications.
  • Further research into their properties and processing can lead to advanced material development.