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関連する概念動画

Metal-Ligand Bonds02:51

Metal-Ligand Bonds

23.9K
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...
23.9K
Coordination Compounds and Nomenclature02:54

Coordination Compounds and Nomenclature

26.1K
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...
26.1K
Lewis Acids and Bases02:33

Lewis Acids and Bases

47.9K
In 1923, G. N. Lewis proposed a generalized definition of acid-base behavior in which acids and bases are identified by their ability to accept or to donate a pair of electrons and form a coordinate covalent bond.
A coordinate covalent bond (or dative bond) occurs when one of the atoms in the bond provides both bonding electrons. For example, a coordinate covalent bond occurs when a water molecule combines with a hydrogen ion to form a hydronium ion. A coordinate covalent bond also results when...
47.9K
Lewis Acids and Bases02:16

Lewis Acids and Bases

16.3K
This lesson delves into Lewis acids and bases in the context of the octet rule for electron-deficient compounds. Here, the concept is discussed, emphasizing the group 13 elements like boron or aluminium. Since group 13 elements possess three valence electrons, they form trivalent compounds with a sextet of electrons and a vacant orbital for the central atom. Consequently, these electron-deficient compounds accept electrons from other species to complete their octet in a chemical reaction. They...
16.3K
Valence Bond Theory02:42

Valence Bond Theory

11.1K
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...
11.1K
Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

1.6K
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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Updated: Jan 9, 2026

Characterizing Lewis Pairs Using Titration Coupled with In Situ Infrared Spectroscopy
07:49

Characterizing Lewis Pairs Using Titration Coupled with In Situ Infrared Spectroscopy

Published on: February 20, 2020

9.8K

中性,ルイス酸性マグネシウム複合体によるアルカン調整

Jeremy C Mullins1, Matthew J Evans1, Joseph M Parr1

  • 1School of Chemistry, Monash University, P.O. Box 23, Melbourne, Victoria 3800, Australia.

Journal of the American Chemical Society
|December 8, 2025
PubMed
まとめ
この要約は機械生成です。

この研究は,最初のグループ2の金属アルカン/TMS複合体を形成する新しいマグネシウムダイミド複合体を合成します. これらの複合体は弱いが有意な結合を示し,静電相互作用が優勢である.

さらに関連する動画

A Protocol for Safe Lithiation Reactions Using Organolithium Reagents
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Preparation of SNS CobaltII Pincer Model Complexes of Liver Alcohol Dehydrogenase
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Preparation of SNS CobaltII Pincer Model Complexes of Liver Alcohol Dehydrogenase

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関連する実験動画

Last Updated: Jan 9, 2026

Characterizing Lewis Pairs Using Titration Coupled with In Situ Infrared Spectroscopy
07:49

Characterizing Lewis Pairs Using Titration Coupled with In Situ Infrared Spectroscopy

Published on: February 20, 2020

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A Protocol for Safe Lithiation Reactions Using Organolithium Reagents
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Preparation of SNS CobaltII Pincer Model Complexes of Liver Alcohol Dehydrogenase
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Preparation of SNS CobaltII Pincer Model Complexes of Liver Alcohol Dehydrogenase

Published on: March 19, 2020

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科学分野:

  • 有機金属化学
  • メイングループ 化学
  • 協調化学

背景:

  • 制限された幾何学を持つルイス酸性マグネシウム二酸化物が合成された.
  • X線結晶学では 分子間調整の二次元構造が示されました

研究 の 目的:

  • 第1グループ2の金属アルカン/TMS複合体を合成し,特徴づけること.
  • これらの新しい複合体内の結合相互作用を調査する.

主な方法:

  • マグネシウムダイアミド複合体の合成
  • 構造的決定のためのX線と中性子の difraktion.
  • ETS-NOCVとNBO分析を含む密度関数理論 (DFT) の計算
  • 非共性相互作用 (NCI) と分子における原子の量子理論 (QTAIM) の分析.

主要な成果:

  • 3つの新しい二酸化マグネシウム複合体 (1-3) が合成された.
  • 複合体1と2は二次元構造を採用した.
  • 最初のグループ2の金属アルカン/TMS複合体 (4-6) は,複合体1をn-ペンタン,n-ヘクサン,またはテトラメチルシラン (TMS) で処理することによって形成された.
  • 構造分析は複合体4-6の配列を確認した.
  • DFT計算では,アルカン/TMSとマグネシウム断片の間の結合が弱いことが示され,移行金属複合体と比べられる.
  • 静電相互作用が支配的な結合成分であることが判明した (約. 65%),分散による有意な貢献 (約. 20%) と軌道相互作用 (約. 15%) でした.

結論:

  • この研究は,グループ2の金属アルカン/TMS複合体の最初の例を報告している.
  • これらの複合体の結合は,静電,分散,軌道相互作用の組み合わせによって特徴付けられます.
  • リポフィルの調整ポケットは分散力に影響し,アルカン/TMSからマグネシウムへの電荷の流れは軌道相互作用に寄与する.