铜的合成和电化学I) 复合物含有弱基,化和多循环
Julie Willrett1, Malte Sellin1, Max Lapersonne1
1Institut für Anorganische und Analytische Chemie und Freiburger Materialforschungszentrum (FMF), Albert-Ludwigs-Universität Freiburg, Albertstr. 21, 79104, Freiburg, Germany.
Chemistry (Weinheim an der Bergstrasse, Germany)
|April 9, 2025
概括
一种新型的铜-二复合物作为合成铜-复合物的多功能前体. 增加的烯化增强了铜的氧化还原潜力,从而实现了前所未有的反应性.
科学领域:
- 有机金属化学 有机金属化学
- 协调化学 协调化学
- 化学 的化学
背景情况:
- 同质的铜 (I) - 烯复合体的合成对于催化和材料科学至关重要.
- 开发用于生成反应性金属中心的新前体是无机化学中持续存在的挑战.
研究的目的:
- 通过使用二铜前体,合成和表征新型铜(I) - 烯复合物.
- 为了研究烯化对铜协调和氧化还原特性的影响.
- 为了证明铜前体与各种烯配体的多功能性.
主要方法:
- 合成二铜复合物[(N2) Cu{Al(ORF) 4}].
- 前体与,化和多环的反应.
- 使用单晶X射线衍射,对得到的复合物进行表征.
- 电化学研究以确定Cu+/Cu的氧化还原潜力.
主要成果:
- 形成同质的,弱结合的Cu(I) -arene复合体,包括[Cu(arene)2-3]+[Al(ORF)4]-和离子对.
- 通过铜氧化证明了和复合物的合成.
- 观察较弱的Cu ((I) -arene协调和更高的氧化还原潜力与增加的化,达到+1.5V与Fc+/Fc在pentafluorobenzene.
- 通过成功复杂化多环,如 antracen 和 hexaphenylbenzene,产生多重电荷的阳离子.
结论:
- 二铜复合物是一种有效的"裸体"Cu (I) 源,用于合成各种Cu (I) -arene复合物.
- 化联体对铜的协调强度和电化学性能产生重大影响.
- 这种前所未有的高氧化还原潜力为新型催化应用提供了开放的途径.
![[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F59739.jpg&w=3840&q=50)
相关概念视频
03:02Colors and Magnetism
11.4K
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...
11.4K
01:13Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene
5.7K
Bromination and chlorination of aromatic rings by electrophilic aromatic substitution reactions are easily achieved, but fluorination and iodination are difficult to achieve. Fluorine is so reactive that its reaction with benzene is difficult to control, resulting in poor yields of monofluoroaromatic products. To address this, Selectfluor reagent is used as a fluorine source in which a fluorine atom is bonded to a positively charged nitrogen.
5.7K
01:20Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions
1.8K
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...
1.8K
01:11Aryldiazonium Salts to Azo Dyes: Diazo Coupling
2.9K
The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the...
2.9K
03:45Formation of Complex Ions
23.0K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.0K
00:56Extraction: Advanced Methods
393
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
393