铁的三基衍生复合物的合成,结构和光谱分析
Liam P Griffin1, Alexis K Bauer1, Agamemnon E Crumpton1
1Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK.
Chemistry (Weinheim an der Bergstrasse, Germany)
|February 17, 2025
概括
第13组金属离子与五碳酸铁反应,形成新的键. 形成的特定键取决于金属 (,或) 和 counterions 的存在,影响电子性质.
科学领域:
- 有机金属化学 有机金属化学
- 主群 化学 化学
- 无机合成 无机合成
背景情况:
- 第13组元素 (Al,Ga,In) 具有不同的反应性.
- 铁五碳烯 (Fe(CO) 5) 是有机金属化学中的多功能前体.
- 了解金属对金属的结合对于设计新材料至关重要.
研究的目的:
- 研究13组离子与铁五碳基的反应性.
- 探索 counterions 对由此产生的铁组 13 复合物的影响.
- 描述新型有机金属化合物的电子和结构性质.
主要方法:
- 第13组离子的合成[(NON) E]− (E=Al,Ga,In).
- 在不同的条件下,离子与铁五甲 (Fe(CO) 5) 的反应.
- 通过X射线衍射进行结构分析.
- 谱学表征 (IR,Mössbauer) 进行.
- 计算研究 (DFT).
主要成果:
- 系统对对子离子捕获表现出敏感性,产生直接的Al-Fe键或桥接碳基物种.
- 和的亲属很容易形成与Fe-E结合的添加物.
- 光谱和计算数据揭示了铁的键极性和电子密度的趋势.
- 三化配体的捐赠者强度在该组下降.
结论:
- 13 组离子与Fe ((CO) 5) 的反应性可通过对应离子选择和特定的13 组元素进行调整.
- 一系列新的铁基13组复合物被合成和特征化.
- 铁中心的电子性质由下降的13组元素调节,影响着连接体供体强度.
相关概念视频
02:34Structural Isomerism
19.1K
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...
19.1K
03:02Colors and Magnetism
11.5K
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...
11.5K
02:42Valence Bond Theory
8.4K
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...
8.4K
01:19Complexation Equilibria: The Chelate Effect
420
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...
420
01:09Complexation Equilibria: Factors Influencing Stability of Complexes
319
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...
319
01:26EDTA: Auxiliary Complexing Reagents
527
EDTA titrations are usually carried out in highly basic conditions, where the fully deprotonated form of EDTA, Y4−, actively complexes with the free metal ions in the solution. Several metal ions precipitate as hydrous oxide (hydroxides, oxides, or oxyhydroxides) under these conditions, lowering the concentration of free metal ions in the solution. For this reason, auxiliary complexing agents or ligands such as ammonia, tartrate, citrate, or triethanolamine are used in EDTA titrations to...
527