相关实验视频
Updated: Jul 17, 2025

10:44
Isolating Free Carbenes, their Mixed Dimers and Organic Radicals
Published on: April 19, 2019
10.8K
带有半三明治或基碳酸的超分子结构:设计,合成和应用
Peng-Fei Cui1, Xin-Ran Liu1, Guo-Xin Jin1
1State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai, 200433, People's Republic of China.
Journal of the American Chemical Society
|August 29, 2023
概括
在超分子化学中,碳酸使区域选择性B-H键激活. 这项研究突出了它们对宿主-客体化学和同位素分离的独特弱相互作用.
科学领域:
- 超分子化学
- 有机金属化学
- 材料科学
背景情况:
- 碳酸具有独特的空间安排和弱相互作用,使其成为超分子化学和宿主-客户应用的前景.
- 在carboranes中控制B-H键的激活是具有挑战性的,但对于它们更广泛的利用至关重要.
- 基于carborane的超分子复合物的新兴领域需要进一步的探索和表征.
研究的目的:
- 介绍碳酸用于超分子化学的重要发现.
- 在carboranes中展示区域选择性B-H键激活策略.
- 在宿主-客人化学和分离等应用中探索碳弱相互作用的潜力.
主要方法:
- 利用 π-π 相互作用,宿主-客人关联以及区域选择性 B-H 键激活的固体效应.
- 使用金属中心和配体来克服carborane开发的挑战.
- 通过二键相互作用识别和分离同位素的应用.
主要成果:
- 在para-carboranes中成功地区域选择性激活B(2,9),B(2,8) 和B(2,7) -H键.
- 在正方体碳酸中成功地选择性激活B(4,7) -H键.
- 碳酸弱相互作用 (例如二键) 对于特定的分子识别任务的证明潜力.
结论:
- 碳酸是具有独特性质的新型超分子复合物的有价值的构建块.
- 区域选择性B-H键激活策略是释放合成的关键.
- 对碳酸弱相互作用的进一步研究将扩大它们在宿主-客体化学和高级应用中的有用性.
相关概念视频
Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions
1.9K
Arenediazonium substitution reactions occur when the diazonium group is substituted by various functional groups such as halides, hydroxyl, nitrile, etc. For instance, arenediazonium salts react with copper(I) salts of chloride, bromide, or cyanide to form corresponding aryl chlorides, bromides, and nitriles. These reactions are named Sandmeyer reactions. Although the mechanism of this reaction is complicated, as illustrated in Figure 1, they are believed to progress via an aryl copper...
1.9K
Radicals: Electronic Structure and Geometry
4.1K
This lesson delves into the geometry of a radical, which is influenced by the electronic structure of the molecule. The principle is similar to that of a lone pair, where the unpaired electron influences the geometry at the radical center.
Accordingly, the structure of a trivalent radical lies between the geometries of carbocations and carbanions. An sp2-hybridized carbocation is trigonal planar, while an sp3-hybridized carbanion is trigonal pyramidal. Here, the difference in geometry is...
Accordingly, the structure of a trivalent radical lies between the geometries of carbocations and carbanions. An sp2-hybridized carbocation is trigonal planar, while an sp3-hybridized carbanion is trigonal pyramidal. Here, the difference in geometry is...
4.1K
Structural Isomerism
19.3K
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...
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...
19.3K
Valence Bond Theory
8.7K
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...
8.7K
Hybridization of Atomic Orbitals II
32.4K
sp3d and sp3d 2 Hybridization
32.4K
Radical Reactivity: Intramolecular vs Intermolecular
1.8K
Radical reactions can occur either intermolecularly or intramolecularly. In an intermolecular radical reaction, a nucleophilic radical adds to an electrophilic alkene or vice versa. In such reactions, the radical and generally the alkene, which is also called the radical trap, are two different molecules. Additionally, for such intermolecular reactions to occur, the radical trap must be active, present in an excess concentration, and the radical starting material must have a weak...
1.8K

