鲁II) 复合物与蛋白质和阳离子裸体NHC接体,用于小分子合作激活
Shambhu Nath1, Ekta Yadav1, Abhinav Raghuvanshi1
1Department of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, India.
Chemistry (Weinheim an der Bergstrasse, Germany)
|June 28, 2023
概括
((II) -N-异环碳复合物表现出合作性小分子激活,包括H2,C-I和C-H键. 这些复合物的阳离子形式在温和条件下有效地激活和转化二氧化碳.
科学领域:
- 有机金属化学 有机金属化学
- 催化剂是一种催化剂.
- 可持续化学 可持续化学
背景情况:
- 复合物与N-异环碳 (NHC) 连接体在催化过程中至关重要.
- 不对称的链连接物具有独特的电子和硬质性质.
- 小分子激活是可持续化学转换的关键.
研究的目的:
- 合成和表征新型 ((II) - 蛋白质-N-异环碳复合物及其去离子形式.
- 为了研究阴离子NHC复合体中的电子结构和粘合.
- 探索无质子复合体1′的合作性小分子激活能力.
主要方法:
- (II) 复合物的合成与一个新的非对称的链连接体.
- 复合物的相互转换通过酸化学.
- 使用ESI-MS,NMR (1H,13C,31P) 和单晶X射线衍射进行表征.
- 电子结构的理论和光谱研究.
- 对小分子激活反应 (H2,CH3I,乙烯,CO2) 的评估.
主要成果:
- 合成和表征了四种可相互转换的鲁II-NHC复合物.
- 在阳离子NHC复合体中证实了电荷分离.
- 综合体1证明了H-H,C(sp3) -I和C(sp) -H债券的合作激活.
- 在适度的温度和环境压力下,高效地激活和转化CO2以形成复合1的过程.
结论:
- 合成的 (II) -NHC复合体为研究电荷分离和合作激活提供了一个平台.
- 阴性NHC复合体1表现出多功能小分子激活,包括CO2转化.
- 这些发现扩大了阴离子NHC复合物的潜在应用在催化和可持续能源解决方案中.
更多相关视频
相关概念视频
Metal-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
ortho–para-Directing Activators: –CH3, –OH, –⁠NH2, –OCH3
6.1K
All ortho–para directors, excluding halogens, are activating groups. These groups donate electrons to the ring, making the ring carbons electron-rich. Consequently, the reactivity of the aromatic ring towards electrophilic substitution increases. For instance, the nitration of anisole is about 10,000 times faster than the nitration of benzene. The electron-donating effect of the methoxy group in anisole activates the ortho and para positions on the ring and stabilizes the corresponding...
6.1K
Cycloaddition Reactions: MO Requirements for Thermal Activation
3.6K
Thermal cycloadditions are reactions where the source of activation energy needed to initiate the reaction is provided in the form of heat. A typical example of a thermally-allowed cycloaddition is the Diels–Alder reaction, which is a [4 + 2] cycloaddition. In contrast, a [2 + 2] cycloaddition is thermally forbidden.
3.6K
Cycloaddition Reactions: MO Requirements for Photochemical Activation
2.1K
Some cycloaddition reactions are activated by heat, while others are initiated by light. For example, a [2 + 2] cycloaddition between two ethylene molecules occurs only in the presence of light. It is photochemically allowed but thermally forbidden.
2.1K
Structural 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
Photochemical Electrocyclic Reactions: Stereochemistry
1.9K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Selection Rules: Photochemical Activation
1.9K


