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

Structural Isomerism02:34

Structural Isomerism

22.3K
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...
22.3K
Stereoisomerism02:52

Stereoisomerism

14.3K
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...
14.3K
Electron Configuration of Multielectron Atoms03:26

Electron Configuration of Multielectron Atoms

65.9K
The alkali metal sodium (atomic number 11) has one more electron than the neon atom. This electron must go into the lowest-energy subshell available, the 3s orbital, giving a 1s22s22p63s1 configuration. The electrons occupying the outermost shell orbital(s) (highest value of n) are called valence electrons, and those occupying the inner shell orbitals are called core electrons. Since the core electron shells correspond to noble gas electron configurations, we can abbreviate electron...
65.9K
Valence Bond Theory02:42

Valence Bond Theory

11.5K
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...
11.5K
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

49.3K
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,...
49.3K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

31.4K
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...
31.4K

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

Observing Kinetic Selectivity in Anthracene Photodimerization through Selective Quenching by Excited States of Proximate Rare Earth Cations.

Journal of the American Chemical Society·2026
Same author

Glucagon-like peptide-1 receptor agonists and rotator cuff disease: a scoping review.

BMC musculoskeletal disorders·2026
Same author

Comparison of Bonding in Isostructural Cerium and Thorium Parent Amide Complexes.

Inorganic chemistry·2026
Same author

Probing the Redox Chemistry of Bimetallic Rare Earth-Catecholate Complexes.

Inorganic chemistry·2026
Same author

Superficial vein thrombosis of the upper extremity after pectoralis major repair: An uncommon complication.

Trauma case reports·2026
Same author

Metal-Dependent Photodissociation of Hydrazone Photoswitches from Rare-Earth Complexes.

Journal of the American Chemical Society·2026

相关实验视频

Updated: Mar 9, 2026

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
09:45

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene

Published on: March 20, 2017

10.9K

(IV) 伊米多复合体:结构,计算和反应性研究

Lukman A Solola1, Alexander V Zabula1, Walter L Dorfner1

  • 1P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States.

Journal of the American Chemical Society
|January 13, 2017
PubMed
概括

金属离子会影响 (IV) 复合体几何,缩短CeN键并增加离子大小. 实现了一种新的不支持的CeN键,DFT揭示了5d轨道对键的贡献.

更多相关视频

Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry
09:37

Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry

Published on: October 18, 2019

10.2K
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

3.4K

相关实验视频

Last Updated: Mar 9, 2026

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
09:45

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene

Published on: March 20, 2017

10.9K
Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry
09:37

Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry

Published on: October 18, 2019

10.2K
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

3.4K

科学领域:

  • 无机化学
  • 有机金属化学
  • 材料科学

背景情况:

  • (IV) imido复合物由于其独特的结合和反应性而引起人们的兴趣.
  • 了解金属对这些复合物的影响对于设计新材料和催化剂至关重要.

研究的目的:

  • 合成和表征一系列金属封闭的 (IV) 化物复合物.
  • 研究金属对-键的结构影响.
  • 探索这些新复合物的反应性.

主要方法:

  • 金属封顶 (IV) 复合物的合成和完整表征.
  • 进行X射线结构调查,以确定对比离子对复杂几何学的影响.
  • 密度功能理论 (DFT) 计算以阐明电子结构和粘合.
  • 涉及-氧键裂变和与的反应的反应性研究.

主要成果:

  • [M(solv) x][CeN(3,5-(CF3) 2C6H3) ((TriNOx) ]复合物的分离和表征 (M = Li, K, Rb, Cs).
  • 观察到CeN键的缩短与金属离子体大小的增加.
  • 第一个无支的终端Ce(IV) N多键复合体与Cs+ counterion和2.2.2-cryptand的分离,其CeN键长为2.077(3) Å.
  • DFT研究表明,5d轨道对CeN键有显著的贡献.
  • 已被证明具有反应性,包括复合物的Si-O键裂变和从鲁比复合物的罕见Ce-IV-oxo复合物的形成.

结论:

  • 金属对子在调整 (IV) imido复合物的结构和结合中起着重要作用.
  • 形成无支终端Ce (IV) N键的能力为化学开辟了新的途径.
  • 这些复合物表现出有趣的反应性,突出了它们在催化和材料科学中的潜在应用.