由N-异环碳酸稳定酸:合成,结构和反应性
Kinga Kaniewska-Laskowska1, Anna Ordyszewska1, Tomasz Wojnowski1
1Department of Inorganic Chemistry, Faculty of Chemistry and Advanced Materials Center, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland. rafal.grubba@pg.edu.pl.
Dalton transactions (Cambridge, England : 2003)
|October 18, 2023
概括
通过N-异环碳 (NHCs) 稳定新的酸酸,作为酸捐赠体. 与它们的中性酸对应物相比,这些酸化合物具有独特的反应性.
科学领域:
- 有机金属化学 有机金属化学
- 化学 化学
- 酸盐化学 酸盐化学
背景情况:
- N-异环碳 (NHCs) 是稳定活性主群物种的多功能连接体.
- 氨基代表了一类具有独特P-B键的化合物,表现出多种反应性.
研究的目的:
- 通过NHCs稳定新型酸酸的合成和特征.
- 为了研究这些电离物种的结构和电子特性.
- 为了探索NHC稳定基酸盐作为酸捐赠者的反应性.
主要方法:
- 通过与NHCs的 () () () () () () () () () () () () () () () () () () () () () () ()) 的反应合成酸.
- 使用异质核磁共振光谱学和X射线衍射进行结构阐明.
- 使用密度函数理论 (DFT) 计算的计算分析.
主要成果:
- 成功合成并表征了NHC稳定型酸与平面三角中心.
- 证明这些子通过异质化P-B键裂变作为基群捐赠体起作用.
- 与中性酸相比,突出了不同的反应模式.
结论:
- 稳定NHC酸酸代表了一种新型的酸酸酸类.
- 这些化合物在与黄金和电友的反应中充当有效的化物捐赠者.
- 电离性质显著影响P-B键的反应性.
相关概念视频
Carbocations
11.3K
Carbocations are one of the reaction intermediates formed during several nucleophilic substitutions or elimination reactions. A carbocation is an electron-deficient species with the central carbon atom having six electrons and three bonded atoms. The central carbon in a carbocation is sp2 hybridized with trigonal planar geometry. It has an empty p orbital perpendicular to the plane of the structure that can accept electrons. Thus, carbocations act as strong electrophiles and may react with any...
11.3K
Chirality at Nitrogen, Phosphorus, and Sulfur
5.7K
Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
5.7K
Exceptions to the Octet Rule
28.4K
Many covalent molecules have central atoms that do not have eight electrons in their Lewis structures. These molecules fall into three categories:
28.4K
Electrophilic Addition to Alkynes: Halogenation
8.2K
Introduction
Halogenation is another class of electrophilic addition reactions where a halogen molecule gets added across a π bond. In alkynes, the presence of two π bonds allows for the addition of two equivalents of halogens (bromine or chlorine). The addition of the first halogen molecule forms a trans-dihaloalkene as the major product and the cis isomer as the minor product. Subsequent addition of the second equivalent yields the tetrahalide.
Halogenation is another class of electrophilic addition reactions where a halogen molecule gets added across a π bond. In alkynes, the presence of two π bonds allows for the addition of two equivalents of halogens (bromine or chlorine). The addition of the first halogen molecule forms a trans-dihaloalkene as the major product and the cis isomer as the minor product. Subsequent addition of the second equivalent yields the tetrahalide.
8.2K
Hybridization of Atomic Orbitals II
32.3K
sp3d and sp3d 2 Hybridization
32.3K
Aromatic Hydrocarbon Cations: Structural Overview
2.8K
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group...
Removing one hydrogen from the intervening CH2 group...
2.8K


