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関連する概念動画

Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

1.2K
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
1.2K
Valence Bond Theory02:42

Valence Bond Theory

11.2K
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...
11.2K
Structural Isomerism02:34

Structural Isomerism

21.5K
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...
21.5K
EDTA: Chemistry and Properties01:22

EDTA: Chemistry and Properties

3.3K
Polydentate ligands are most widely used in complexometric titrations because they form more stable complexes with the metal ions than mono- or bidentate ligands due to the chelate effect. Examples of polydentate ligands are ethylenediaminetetraacetic acid (EDTA), crown ethers, and cryptands. The most important feature of optimal polydentate ligands is the ability to form 1:1 complexes in a single-step process. Amino carboxylic acid derivatives are frequently used as complexing agents. EDTA is...
3.3K
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

48.2K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
48.2K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

30.6K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
30.6K

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Updated: Jan 16, 2026

Application of Elemental Lanthanides in the Selective C-F Activation of Trifluoromethylated Benzofulvenes Providing Access to Various Difluoroalkenes
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Application of Elemental Lanthanides in the Selective C-F Activation of Trifluoromethylated Benzofulvenes Providing Access to Various Difluoroalkenes

Published on: July 28, 2018

6.9K

ヨーロッパ ((II) イノラート複合物:合成,結合,および反応性

Qingqing Wen1, Ruyi Li2, Xiaojuan Liu1

  • 1Spin-X Institute, School of Chemistry and Chemical Engineering, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510641, China.

Journal of the American Chemical Society
|September 29, 2025
PubMed
まとめ
この要約は機械生成です。

研究者は,最初のランタニドイノラート複合体,ヨーロッパイノラートについて報告した. この発見は,難解なイノラート複合体を特徴付けることで,有機金属化学を進歩させ,反応性研究のための新しい道を開きます.

さらに関連する動画

Synthesis of Core-shell Lanthanide-doped Upconversion Nanocrystals for Cellular Applications
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Synthesis of Core-shell Lanthanide-doped Upconversion Nanocrystals for Cellular Applications

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The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
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The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes

Published on: April 10, 2015

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関連する実験動画

Last Updated: Jan 16, 2026

Application of Elemental Lanthanides in the Selective C-F Activation of Trifluoromethylated Benzofulvenes Providing Access to Various Difluoroalkenes
10:10

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Synthesis of Core-shell Lanthanide-doped Upconversion Nanocrystals for Cellular Applications
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The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
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The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes

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科学分野:

  • 有機金属化学
  • 無機化学
  • 協調化学

背景:

  • アニオンケテンはケテニルアニオンとイノラートアニオンという2つの共振形態で存在する.
  • ケテニル複合体はよく特徴づけられているが,結晶イノラート複合体は文献では捉え難いままである.
  • ランタニド複合体は,反応性の種を安定させるためのユニークな電子およびステリック特性を提供します.

研究 の 目的:

  • 最初のランタナイドイノラート複合体を合成し,特徴づけました.
  • ランタニド複合体のイノラートリガンドの電子構造と結合特性を解明する.
  • 新型ランタニドイノラート複合体の反応性を調べる

主な方法:

  • シグマ結合メタテシス反応による合成,続いて炭素化.
  • 単一結晶のX線微分法で構造を決定する.
  • 電子構造分析と機械学的研究のための密度関数理論 (DFT) の計算.

主要な成果:

  • 最初のランタニドイノラート複合体であるユーロピウム (II) イノラートは,成功して合成され特徴づけられた.
  • X線微分とDFT計算は,酸素に有意な負の電荷を持つイノラート共振形態の優位性を確認した.
  • 反応性研究では,Cを中心に様々な電ophilesを持つ捕獲製品が示され,イノラート特性を示した.

結論:

  • この研究は,重要な合成課題を克服したランタニドイノラート複合体の最初の結晶の例を提供します.
  • この研究は,イノラート共鳴形の優位性を確認し,ユニークな電子特性を明らかにしています.
  • カーボディミドとの反応におけるケテニル特性へのシフトを含む観察された反応性は,新しい変換の可能性を強調する.