价值陶托梅里斯诱导的质子合电子转移:X-H键氧化与双核Au(II) 氧化复合体
Kristopher M Hess1, Isaac F Leach1, Lisa Wijtenhorst1
1Molecular Inorganic Chemistry, Stratingh Institute for Chemistry, Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, 9747, AG Groningen, The Netherlands.
Angewandte Chemie (International ed. in English)
|February 7, 2024
概括
这项研究详细介绍了一种双核黄金(II) 氧化物复合物,该复合物表现出罕见的协同质子合电子转移 (cPCET) 反应性. 这种机制使黄金化学中通过价值分离体实现了前所未有的激素类型反应.
科学领域:
- 无机化学 无机化学
- 有机金属化学 有机金属化学
- 催化剂是一种催化剂.
背景情况:
- 双核黄金复合物因其独特的电子结构和反应性而引起人们的兴趣.
- 了解涉及黄金复合物的反应机制对于开发新的催化过程至关重要.
- 质子合电子转移 (PCET) 是化学的一个基本过程,但对于黄金复合体来说很少见.
研究的目的:
- 为了合成和表征一种新的双核黄金(II) 氧化物复合物.
- 调查这个复合体对弱X-H键的反应性.
- 为了阐明由黄金复合物氧化环二烯的机制.
主要方法:
- 合成和表征双核Au(II) 氧化物复合物Au2(L) 2 ((OH) 2.
- 用循环二烯反应的动态分析.
- 计算研究 (例如,DFT) 来建模反应路径.
主要成果:
- 双核Au(II) 氧化物复合物已成功准备和表征.
- 循环二烯的氧化过程通过一种罕见的协同质子合电子转移 (cPCET) 机制进行.
- 欧奥-欧奥西格玛键极化和价值对称是cPCET事件的关键特征.
结论:
- 双核黄金 (II) 复合物通过一种由定聚体诱导的cPCET机制促进氧化.
- 这种机制涉及质子和电子转移之间的独特相互作用,与Au-Au键极化协调.
- 这项研究揭示了前所未有的关闭外Au(II) 复合物的激素类型反应性,扩大了黄金催化作用的范围.
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
01:14Keto–Enol Tautomerism: Mechanism
5.4K
The keto and enol forms are known as tautomers and they constantly interconvert (or tautomerize) between the two forms under acid or base catalyzed conditions. Both the reactions involve the same steps—protonation and deprotonation— although in the reverse order.
5.4K
02:21Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
11.5K
Alkenes can be dihydroxylated using potassium permanganate. The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
11.5K
02:44Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
10.2K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
10.2K
02:04Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids
5.8K
Diols are compounds with two hydroxyl groups. In addition to syn dihydroxylation, diols can also be synthesized through the process of anti dihydroxylation. The process involves treating an alkene with a peroxycarboxylic acid to form an epoxide. Epoxides are highly strained three-membered rings with oxygen and two carbons occupying the corners of an equilateral triangle. This step is followed by ring-opening of the epoxide in the presence of an aqueous acid to give a trans diol.
5.8K
02:37Oxidation of Alcohols
13.1K
In this lesson, the oxidation of alcohols is discussed in depth. The various reagents used for oxidation of primary and secondary alcohols are detailed, and their mechanism of action is provided.
The process of oxidation in a chemical reaction is observed in any of the three forms:
The process of oxidation in a chemical reaction is observed in any of the three forms:
13.1K