Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Aromatic Hydrocarbon Cations: Structural Overview01:18

Aromatic Hydrocarbon Cations: Structural Overview

2.8K
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...
2.8K
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

380
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
380
EDTA: Chemistry and Properties01:22

EDTA: Chemistry and Properties

1.9K
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...
1.9K
Aromatic Hydrocarbon Anions: Structural Overview01:18

Aromatic Hydrocarbon Anions: Structural Overview

2.8K
Neutral hydrocarbons like cyclopentadiene with an odd number of carbon atoms and one intervening CH2 group in the ring are not aromatic. Cyclopentadiene with 4 π electrons does not satisfy the 4n + 2 π electron rule. Additionally, the intervening CH2 group is sp3 hybridized and lacks a vacant p orbital, thereby interrupting the overlap of p orbitals in a continuous manner and preventing the delocalization of π electrons throughout the ring.
Due to the absence of continuous...
2.8K
Colors and Magnetism03:02

Colors and Magnetism

11.7K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
11.7K
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

20.8K
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...
20.8K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Oxidative Porphyrinoid Metamorphosis of Fourfold N-Confused [32]Octaphyrin Bis-Metal Complex to Doubly Linked 10-Oxacorrole Metal Complex Dimer.

Angewandte Chemie (International ed. in English)·2026
Same author

Triply N-Confused Hexaphyrins(1.1.1.1.1.0) Synthesized From N-Confused Hexaphyrin(2.1.1.1.1.1): Aromaticity Modulation, Metal Coordination, and Photothermal Conversion.

Angewandte Chemie (International ed. in English)·2026
Same author

Symmetry-breaking charge separation: from charge generation to functional charge utilization.

Chemical science·2026
Same author

Engineering Cofacial Trizinc(II)porphyrin Trimers: Linking Molecular Architecture with Excited-State Dynamics.

Inorganic chemistry·2026
Same author

Bending-Induced Vibrational Landscape Reorganization Governs Energy Dissipation in Perylene Bisimides.

Angewandte Chemie (International ed. in English)·2026
Same author

Redox- and protonation-driven Baird and Clar aromaticity in asymmetric multicyclic octaphyrins.

Chemical science·2026

相关实验视频

Updated: Jul 11, 2025

Preparation of SNS CobaltII Pincer Model Complexes of Liver Alcohol Dehydrogenase
06:31

Preparation of SNS CobaltII Pincer Model Complexes of Liver Alcohol Dehydrogenase

Published on: March 19, 2020

7.1K

稳定抗芳香 [24] 六氨酸 ((1.1.0.0.1.0) 和其金属复合物

Yang Liu1, Ling Xu1, Yutao Rao1

  • 1Key Laboratory of Chemical Biology and Traditional Chinese Medicine (Ministry of Educational of China), Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha 410081, China.

Organic letters
|November 6, 2023
PubMed
概括

研究人员合成了一种稳定的抗芳香 [24]hexaphyrin分子,该分子形成独特的bis-palladium (II) 和tris-rhodium (I) 复合体. 芳香的 [26] 六氨酸是不稳定的,很容易氧化回 [24] 形式.

更多相关视频

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

9.7K
Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex
10:52

Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex

Published on: July 27, 2022

2.8K

相关实验视频

Last Updated: Jul 11, 2025

Preparation of SNS CobaltII Pincer Model Complexes of Liver Alcohol Dehydrogenase
06:31

Preparation of SNS CobaltII Pincer Model Complexes of Liver Alcohol Dehydrogenase

Published on: March 19, 2020

7.1K
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

9.7K
Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex
10:52

Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex

Published on: July 27, 2022

2.8K

科学领域:

  • 有机化学 有机化学
  • 超分子化学 超分子化学
  • 协调化学 协调化学

背景情况:

  • 六氨酸是具有独特电子和结构性质的宏环化合物.
  • 控制六氨酸系统的芳香度和稳定性对于它们的应用至关重要.
  • 替代的六氨酸为复杂化和材料科学提供了可调节的特性.

研究的目的:

  • 合成一种具有抗芳香性质的稳定,替代 [24] 六氨酸.
  • 为了研究将 [24]hexaphyrin 减少为其芳香 [26] 的对应物.
  • 探索合成的 [24] 六氨酸与金属离子,特别是和的协调化学反应.

主要方法:

  • 基催化双重SNAr反应用于合成 [24]hexaphyrin.
  • 通过化学还原获得 [26] 六氨酸.
  • 与 (II) 和 (I) 盐的复合反应.

主要成果:

  • 成功合成了一种稳定的5,10,23-三聚基替代 [24] 赫萨菲林.
  • [24]hexaphyrin被减少到一个不稳定的芳香 [26]hexaphyrin,它很容易被氧化回来.
  • [24] 六氨酸形成了独特的bis-PdII和tris-RhI复合体.
  • 的bis-PdII 复合体表现出强烈的偏热带环流.
  • 三-RhI复合体显示了不寻常的协调,涉及一个共享的碳基.

结论:

  • 稳定的抗芳香六氨酸可以合成,并作为多功能联结体.
  • 反芳香和芳香六氨酸之间的相互转换突出了它们的动态电子性质.
  • 金属复合体中独特的协调几何学提供了对新型超分子结构的洞察.