在双金属Dinickel (II) 复合体中交换H2/D2并进行替换
Dennis-Helmut Manz1, Peng-Cheng Duan1, Sebastian Dechert1
1Institut für Anorganische Chemie, Universität Göttingen , Tammannstrasse 4, D-37077 Göttingen, Germany.
Journal of the American Chemical Society
|October 18, 2017
概括
双核二复合物储存降解等价物,使H2释放和掩盖的二I) 核心形成. 这个支架显示了生物启发小分子激活的潜力.
科学领域:
- 有机金属化学
- 生物有机化学
背景情况:
- 双核金属复合物为小分子激活提供独特的反应性.
- 了解化物转移机制对于催化非常重要.
研究的目的:
- 合成和描述新的双核二化合物.
- 调查H2/D2交换机制和掩盖的芯的反应性.
- 探索这个系统在生物催化中的潜力.
主要方法:
- 合成和分离双核 (II) 二化合物.
- 结晶学表征
- 核磁共振 (NMR) 光谱 (1H和2H NMR,2D 1H EXSY).
- 密度函数理论 (DFT) 的计算.
- 这是一个很好的方法.
主要成果:
- 新型二核 (II) 二复合物M[LNi2(H) 2 (M=Na,K) 被合成并进行结构特征,揭示了与金属相互作用的合物.
- 观察到一种不寻常的双向H2/D2交换过程,包括两个Ni-H部分同步无H/D编码.
- DFT计算揭示了终端化物易于重组以形成H2和dnickel (I) 种,具有中等的激活屏障.
- 动力学研究证实了H2释放对复杂度的第一级依赖性和金属子的显著影响.
- 二复合物作为一个掩盖的二核心,能够在基质相互作用时释放H2.
结论:
- 双核二复合物作为高反应性双I物种的有效掩体前体.
- 观察到的H2/D2交换机制为双金属系统中的化物动态提供了洞察力.
- 金属离子在稳定二核和影响反应性方面发挥着至关重要的作用.
- 这种双金属支架对生物启发的催化应用具有前景,模仿酶功能的步骤来激活小分子.
相关概念视频
Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride
2.3K
Radical substitution reactions can be used to remove functional groups from molecules. The hydrogenolysis of alkyl halides is one such reaction, where the weak Sn–H bond in tributyltin hydride reacts with alkyl halides to form alkanes. Here, the reagent Bu3SnH yields tributyltin halide as a byproduct.
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation reactions,...
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation reactions,...
2.3K
[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction
12.7K
The Diels–Alder reaction is an example of a thermal pericyclic reaction between a conjugated diene and an alkene or alkyne, commonly referred to as a dienophile. The reaction involves a concerted movement of six π electrons, four from the diene and two from the dienophile, forming an unsaturated six-membered ring. As a result, these reactions are classified as [4+2] cycloadditions.
12.7K
Valence Bond Theory
11.4K
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...
11.4K
Catalysis
30.9K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
30.9K
Molecular Orbital Theory II
27.8K
Molecular Orbital Energy Diagrams
27.8K
Electrophilic 1,2- and 1,4-Addition of HX to 1,3-Butadiene
9.0K
The electrophilic addition of hydrogen halides such as HBr to alkenes and nonconjugated dienes gives a single product as per Markovnikov’s rule.
9.0K


