铁三合一的金属化物的特性
Arie J H Multem1, Guilherme L Tripodi1, Jana Roithová1
1Department of Spectroscopy and Catalysis, Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands.
Journal of the American Chemical Society
|December 7, 2023
概括
一种新的质谱法量化金属化物复合物的化物捐赠能力. 这种技术使用能量溶解的碰撞诱导解离,与化反应中的反应性相对应.
科学领域:
- 协调化学
- 有机金属化学
- 质谱学
背景情况:
- 金属化物复合物是化反应中的关键中间体.
- 这些复合物的化物捐赠能力决定了它们的效用和反应性.
- 量化化物捐赠能力对于设计高效的催化系统至关重要.
研究的目的:
- 开发一种基于质谱的简单方法来评估金属化物复合物的化物捐赠能力.
- 确定测量的能量值与化物供体强度之间的相关性.
- 研究光谱特性与化物转移反应性的关系.
主要方法:
- 合成和表征18种铁,和复合物与N和P基联体.
- 通过与NaBH4的反应形成金属化物复合物[{L}MII{BH4}+
- 电喷离子质谱 (ESI-MS) 用于检测复合物.
- 能量解决碰撞诱导解离 (ER-CID) 实验以确定值能量 (ΔE_CID).
- 对生成的金属化物的振动和电子光谱进行分析.
主要成果:
- 建立了一种新的质谱法来研究化物捐赠能力.
- 值能量 (ΔE_CID) 来自ER-CID的[{L}MII{BH4) ]+与化物捐赠能力相关.
- 对金属化物的光谱数据 (振动和电子) 进行了分析,并与 ΔE_CID 相对应.
- ΔE_CID值与气相化物转移率和已知的溶液相反应趋势有很好的相关性.
结论:
- 开发的质谱法提供了一种可靠而简单的方法来评估金属化物复合物的化物捐赠能力.
- 来自ER-CID的值能量作为化物供体强度的定量度量.
- 这种方法有助于理解和预测化和化物转移反应中的反应性.
更多相关视频
06:53Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
2.0K
07:56Preparation of 6-aminocyclohepta-2,4-dien-1-one Derivatives via Tricarbonyltroponeiron
Published on: August 12, 2019
8.0K
相关概念视频
02:42Valence Bond Theory
8.6K
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...
8.6K
02:58Properties of Transition Metals
26.0K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
26.0K
01:09Complexation Equilibria: Factors Influencing Stability of Complexes
376
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...
376
03:02Colors 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...
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
02:51Metal-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...
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
01:26Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride
1.8K
Radical substitution reactions can be used to remove functional groups from molecules. The hydrogenolysis of alkyl halides is one such reaction, where the weak Sn–H bond in tributyltin hydride reacts with alkyl halides to form alkanes. Here, the reagent Bu3SnH yields tributyltin halide as a byproduct.
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation...
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation...
1.8K