一个DianionicC3-对称的子酸盐的同质Fe (III) 和Fe (IV) 复合体
Serhii Tretiakov1, Martin Lutz2, Charles James Titus3
1Organic Chemistry & Catalysis, Institute for Sustainable and Circular Chemistry, Utrecht University, 3584 CG Utrecht, The Netherlands.
Inorganic chemistry
|June 27, 2023
概括
本研究详细介绍了一种稳定的高价值铁 (IV) 复合物的合成和表征,使用一种新型的子酸连接体. 这项研究有助于更好地理解催化过程中铁的氧化状态.
科学领域:
- 无机化学 无机化学
- 有机金属化学 有机金属化学
- 催化剂是一种催化剂.
背景情况:
- 高价值铁物种是生物和合成氧化催化过程中至关重要的中间体.
- 虽然异体质Fe (IV) 复合体很常见,但同体质的例子很少见.
- 子酸连接体为金属离子提供独特的协调环境.
研究的目的:
- 合成和表征同质的高价值铁复合物.
- 为了研究铁复合体的氧化还原化学和电子结构与三-基甲基 (TSMP^2-) 连接体.
- 为了解八面体Fe (IV) 复合体做出贡献.
主要方法:
- 用TSMP^2-连接体合成铁复合物.
- 电化学和光谱学表征 (SQUID,埃文斯方法,NMR).
- 计算建模和量子化学计算.
主要成果:
- 形成八面体Fe (II),Fe (III) 和Fe (IV) 复合体与TSMP^2-连接体.
- 在Fe (III) 复合体中观察热自旋交叉.
- 一个稳定,高价值Fe(IV) 复合物的表征,具有三重基态 (S=1) 和金属中心氧化.
- 详细分析磁性 (g-tensor,ZFS参数D) 的特性.
结论:
- TSMP^2-连接体稳定了一种罕见的同质高价值Fe (IV) 复合体.
- 铁 (Fe) 复合体表现出以金属为中心的氧化与最小的旋转移位.
- 这项工作提供了对八面体Fe (IV) 物种与催化相关的特性有价值的见解.
更多相关视频
07:56Preparation of 6-aminocyclohepta-2,4-dien-1-one Derivatives via Tricarbonyltroponeiron
Published on: August 12, 2019
8.1K
11:04Ion Mobility-Mass Spectrometry Techniques for Determining the Structure and Mechanisms of Metal Ion Recognition and Redox Activity of Metal Binding Oligopeptides
Published on: September 7, 2019
9.3K
相关概念视频
03:02Colors and Magnetism
12.0K
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...
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...
12.0K
02:34Structural Isomerism
19.5K
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...
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...
19.5K
03:45Formation of Complex Ions
23.8K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.8K
02:42Valence Bond Theory
8.8K
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...
8.8K
01:19Complexation Equilibria: The Chelate Effect
569
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
569
02:51Metal-Ligand Bonds
21.1K
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...
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...
21.1K