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関連する概念動画

Bonding in Metals02:32

Bonding in Metals

Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
Properties of Transition Metals02:58

Properties of Transition Metals

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.
Theory of Metallic Conduction01:17

Theory of Metallic Conduction

The conduction of free electrons inside a conductor is best described by quantum mechanics. However, a classical model makes predictions close to the results of quantum mechanics. It is called the theory of metallic conduction.
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
Transition State Theory01:25

Transition State Theory

Transition-state theory, also known as activated-complex theory, provides a molecular-level explanation of reaction rates in both gas-phase and solution-phase reactions. It extends earlier kinetic models by considering the formation of a short-lived, high-energy configuration during a reaction.The progress of a chemical reaction can be represented using a reaction profile, which plots potential energy against the reaction coordinate. As two reactant molecules approach one another, their...
Heterogeneous Catalysis01:22

Heterogeneous Catalysis

Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
Social Exchange Theory01:26

Social Exchange Theory

As formulated by John Thibaut and Harold Kelley, Social Exchange Theory explains human relationships as economic-like exchanges that maximize rewards and minimize costs. This theory suggests that individuals engage in relationships to gain benefits and reduce burdens, similar to economic transactions. It has been widely applied to various types of relationships, including romantic, professional, and social interactions.Rewards and Costs in RelationshipsRelationship rewards include emotional...

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Ethylene Polymerizations Using Parallel Pressure Reactors and a Kinetic Analysis of Chain Transfer Polymerization
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トランジションメタル-炭素複合体. 理論的な研究である.

Andreas Krapp1, Krishna K Pandey, Gernot Frenking

  • 1School of Chemical Sciences, Devi Ahilya University Indore, Indore-452017, India.

Journal of the American Chemical Society
|May 29, 2007
PubMed
まとめ
この要約は機械生成です。

炭素リガンドを持つルテニウムと鉄の複合体は,特に16電子価 (16VE) 種において,強い金属-炭素結合を示す. 金属-炭素結合は,金属-カルボニル結合よりも強く,16VE複合体は18電子対価 (18VE) 複合体よりも安定性が高い.

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Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
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Last Updated: Jun 25, 2026

Ethylene Polymerizations Using Parallel Pressure Reactors and a Kinetic Analysis of Chain Transfer Polymerization
07:28

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Synthesis of Triazole and Tetrazole-Functionalized Zr-Based Metal-Organic Frameworks Through Post-Synthetic Ligand Exchange
04:51

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Published on: June 23, 2023

科学分野:

  • 有機金属化学 有機金属化学
  • コンピューティング・ケミストリー
  • 無機化学 無機化学とは

背景:

  • 金属-リガンド結合の調査は,化学反応性の理解に不可欠です.
  • 炭素リガンドを含むルテニウムと鉄の複合体は,それらの潜在的な応用のために興味があります.

研究 の 目的:

  • 16および18電子価 (16VEおよび18VE) のルテニウムと鉄の複合体と裸の炭素リガンドの均衡幾何学と結合解離エネルギーを決定する.
  • 金属-炭素結合の強さを金属-カルボニル結合と比較するために.
  • 電荷とエネルギーの分解分析 (EDA) を用いて結合相互作用を分析する.

主な方法:

  • BP86/TZ2Pレベルでの密度関数理論 (DFT).
  • TZ2Pベースセットを使用したシングルとダブル (CCSD(T)) のカップリングされたクラスター計算.
  • エネルギー分解分析 (EDA) について

主要な成果:

  • 16VEルテニウム-炭素 (Ru-C) 結合は,鉄-炭素 (Fe-C) 結合よりも強い.
  • 18VE複合体の金属-炭素結合は16VE種よりも弱い.
  • 金属-炭素結合は,金属-カルボニル結合よりも著しく強い.
  • 18VE鉄複合体は,18VEルテニウム複合体よりも高い結合解離エネルギー (BDE) を示すが,16VE化合物の傾向は逆である.

結論:

  • 16VE複合体の強いRu-CとFe-C結合は,金属-Cシグマ相互作用によって安定させられる.
  • 18VE複合体の結合は,閉じた殻のドナー-受容体相互作用によってよりよく説明されます.
  • メタル-炭素とメタル-カルボニル結合相互作用の性質は似ていますが,炭素複合体の絶対エネルギー項はより大きいです.
  • 18VE化合物は,16VE化合物と比較して,金属-炭素および金属-カルボニル結合がより長く,より弱くなっています.