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Structural Isomerism02:34

Structural Isomerism

16.8K
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,...
16.8K
Stereoisomerism02:52

Stereoisomerism

11.1K
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...
11.1K
Oxidation and Reduction of Organic Molecules01:19

Oxidation and Reduction of Organic Molecules

8.0K
Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
The removal of an electron from a molecule, results in a...
8.0K
Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

2.1K
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.
2.1K
Reactions at the Benzylic Position: Oxidation and Reduction00:59

Reactions at the Benzylic Position: Oxidation and Reduction

4.3K
The benzylic position describes the position of a carbon atom attached directly to a benzene ring. Benzene by itself does not undergo oxidation. In contrast, the benzylic carbon is quite reactive in the presence of strong oxidizing agents such as KMnO4 or H2CrO4. Therefore, alkylbenzenes are readily oxidized to benzoic acid, irrespective of the type of alkyl groups.
4.3K
Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions01:20

Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions

2.0K
Arenediazonium substitution reactions occur when the diazonium group is substituted by various functional groups such as halides, hydroxyl, nitrile, etc. For instance, arenediazonium salts react with copper(I) salts of chloride, bromide, or cyanide to form corresponding aryl chlorides, bromides, and nitriles. These reactions are named Sandmeyer reactions. Although the mechanism of this reaction is complicated, as illustrated in Figure 1, they are believed to progress via an aryl copper...
2.0K

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関連する実験動画

Updated: May 4, 2026

Solid-phase Synthesis of [4.4] Spirocyclic Oximes
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Solid-phase Synthesis of [4.4] Spirocyclic Oximes

Published on: February 6, 2019

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臓器銅 (III) スパイロ複合体:合成,構造的特徴化,およびレドックス変換

Liang Liu1, Miaomiao Zhu1,2, Hai-Tao Yu2

  • 1Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University , Beijing 100871, China.

Journal of the American Chemical Society
|September 22, 2017
PubMed
まとめ

この研究は,C−C結合形成における銅 (III) の中間物質に関する最初の具体的な証拠を提供する. 新しい銅 (III) スピロ複合体は合成され,分子内還元性排出が実証され,触媒におけるその役割が確認された.

さらに関連する動画

Efficient Construction of Drug-like Bispirocyclic Scaffolds Via Organocatalytic Cycloadditions of α-Imino γ-Lactones and Alkylidene Pyrazolones
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Efficient Construction of Drug-like Bispirocyclic Scaffolds Via Organocatalytic Cycloadditions of α-Imino γ-Lactones and Alkylidene Pyrazolones

Published on: February 7, 2019

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Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy
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Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy

Published on: November 9, 2019

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関連する実験動画

Last Updated: May 4, 2026

Solid-phase Synthesis of [4.4] Spirocyclic Oximes
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Solid-phase Synthesis of [4.4] Spirocyclic Oximes

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Efficient Construction of Drug-like Bispirocyclic Scaffolds Via Organocatalytic Cycloadditions of α-Imino γ-Lactones and Alkylidene Pyrazolones
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Efficient Construction of Drug-like Bispirocyclic Scaffolds Via Organocatalytic Cycloadditions of α-Imino γ-Lactones and Alkylidene Pyrazolones

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Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy
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Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy

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科学分野:

  • 有機金属化学
  • カタリシス
  • 合成化学

背景:

  • C−CとC−ヘテロ原子結合の形成には,銅 (III) 中間物質の還元性除去が不可欠である.
  • これらのCu (III) 中間物質の直接的な証拠は,その不安定性のために欠けています.

研究 の 目的:

  • 新種の有機銅 (III) スパイロ複合体を合成し,構造的に特徴づけること.
  • Cu (III) の中間物質が還元性除去反応に関与する具体的な証拠を提供すること.

主な方法:

  • 新種の有機銅 (I) と有機銅 (III) のスパイロ複合体の合成
  • 単一結晶X線構造分析で,幾何学を決定する.
  • Cu (I) と Cu (III) の間の相互変換を観察するためのレドックス定位.

主要な成果:

  • 新しい有機銅 (III) と有機銅 (I) のスパイロ複合体は,成功して合成され,構造的に特徴づけられました.
  • X線解析により,異なる幾何学が明らかになった.Cu (III) の場合は歪んだ正方形,Cu (I) の場合は四面体である.
  • Cu (I) と Cu (III) のスパイロ複合体間の酸化還元変換の実験観察.

結論:

  • 合成された有機銅 (III) スパイロ化合物は,Cu (III) の中間物質の最初の具体的な証拠を提供します.
  • これらのCu (III) 複合体は,C−C結合を形成するために,分子内還元性排出を経験する.
  • この研究は,銅触媒による結合形成反応における提案されたメカニズムを検証している.