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関連する概念動画

Coordination Number and Geometry02:57

Coordination Number and Geometry

19.4K
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.
19.4K
Structure of Benzene: Molecular Orbital Model01:18

Structure of Benzene: Molecular Orbital Model

13.3K
According to the molecular orbital (MO) model, benzene has a planar structure with a regular hexagon of six sp2 hybridized carbons. As shown in Figure 1, each carbon is bonded to three other atoms with C–C–C and H–C–C bond angles of 120°. The C–H bond length is 109 pm, and the C–C bond length is 139 pm which is midway between the single bond length of sp3 hybridized carbons (154 pm) and sp2 hybridized carbons (133 pm).
13.3K
Valence Bond Theory02:42

Valence Bond Theory

11.5K
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...
11.5K
Aromatic Hydrocarbon Cations: Structural Overview01:18

Aromatic Hydrocarbon Cations: Structural Overview

4.1K
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group...
4.1K
Coordination Compounds and Nomenclature02:54

Coordination Compounds and Nomenclature

27.7K
In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
27.7K
Structural Isomerism02:34

Structural Isomerism

22.3K
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...
22.3K

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関連する実験動画

Updated: Mar 10, 2026

Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units
09:35

Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units

Published on: September 18, 2016

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2Dコーディネーションポリマーの構成要素としてのヘクサアミノベンゼン

Nabajit Lahiri1, Neda Lotfizadeh1, Ryuichi Tsuchikawa1

  • 1Department of Chemistry and ‡Department of Physics and Astronomy, University of Utah , Salt Lake City, Utah 84112, United States.

Journal of the American Chemical Society
|December 13, 2016
PubMed
まとめ
この要約は機械生成です。

2次元の協調ポリマーは,ボトムアップ方式で合成されました. これらの新しいナノシートには軽度の伝導性があり,電子機器の応用の可能性があります.

さらに関連する動画

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
19:58

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions

Published on: July 30, 2017

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Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
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Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly

Published on: February 6, 2020

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関連する実験動画

Last Updated: Mar 10, 2026

Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units
09:35

Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units

Published on: September 18, 2016

12.2K
Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
19:58

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions

Published on: July 30, 2017

10.3K
Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
09:34

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly

Published on: February 6, 2020

8.1K

科学分野:

  • 材料科学
  • ナノテクノロジー
  • 化学について

背景:

  • 二次元 (2D) 材料は,高度なアプリケーションにユニークな特性を提供します.
  • 協調ポリマーは新しい2D構造の設計に多用途なプラットフォームを提供します.

研究 の 目的:

  • 新しい2D協調ポリマーファミリーを合成し特徴づけること.
  • これらの材料の構造と電子特性を探求する.
  • 電子機器での使用の可能性を調査する.

主な方法:

  • 液体-液体,空気-液体の界面反応を含むボトムアップ合成技術.
  • 形態学的分析のための原子力顕微鏡 (AFM) とスキャニング電子顕微鏡 (SEM).
  • クリスタル構造の決定のための選択領域 difraktion (SAD).

主要な成果:

  • Ni2+,Cu2+,Co2+,およびヘクサアミノベンゼンを使用して2D調整ポリマーを成功裏に合成しました.
  • 厚さ (∼1-2 μm) と薄さ (<10 nm) のナノシート層を積み重ねている.
  • 六角形の結晶構造を確認した
  • 薄いNi基ナノシートから製造された電子機器は,軽度の伝導性とバックゲート依存の伝導性を示しています.

結論:

  • 合成された2Dコーディネーションポリマーは,よく定義された六角形の結晶構造を有する.
  • ナノシートの薄さは 半導体として有望な性能を示しています
  • これらの材料は,ナノ電子機器の将来の開発の可能性を持っています.