直接观察化物插入-和氧化物复合物中的化物
Christopher Krug1, John F Hartwig
1Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520-8107, USA.
Journal of the American Chemical Society
|February 21, 2002
概括
有机 ((I) 复合物与基化物反应,在非水性条件下产生子,在水性混合物中产生二甲醇. 机械学研究显示,将化物插入-结合物是关键步骤.
科学领域:
- 有机金属化学 有机金属化学
- 催化剂的催化剂
- 有机合成 有机合成
背景情况:
- 有机 ((I) 复合物为有机转化提供了独特的反应性.
- 了解反应机制对于开发高效的合成方法至关重要.
研究的目的:
- 为了研究有机 (((I) 复合物与甲的反应性.
- 阐明和二甲基甲醇形成的机制.
- 通过双插入途径探索的合成.
主要方法:
- 合成和分离有机 ((I) 复合物.
- 在不同的溶剂条件下 (非水性和水性THF) 复合物的与甲的反应.
- 机理学研究包括动态同位素效应和中间特性.
主要成果:
- 在非水性条件下,子通过化物插入和β-化物排除在良好的产量下形成.
- 甲醇仅在THF/水混合物中通过化物插入和水解产生.
- 一种二甲氧化中间体被直接观察并进行了表征.
- 乙通过双插入和β-消除序列与多余的化物形成.
结论:
- 反应途径是由溶剂条件决定的,导致或二甲基甲醇.
- 将化物插入-烯键是主要的步骤.
- 观察到的中间和后续反应支持一种涉及β-的消除和/或水解的机制.
更多相关视频
11:47The Effect of Interfacial Chemical Bonding in TiO2-SiO2 Composites on Their Photocatalytic NOx Abatement Performance
Published on: July 4, 2017
11:38In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework
Published on: February 1, 2020
相关概念视频
Redox Reactions
Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
Synthesis and Decomposition Reactions
Synthesis and decomposition are two types of redox reactions. Synthesis means to make something, whereas decomposition means to break something. The reactions are accompanied by chemical and energy changes.
Oxidation and Reduction of Organic Molecules
Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
The removal of an electron from a molecule, results in a...
The removal of an electron from a molecule, results in a...
Properties of Organometallic Compounds
Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
Catalysis
Catalysis influences the rate of chemical reactions by providing an alternative reaction pathway with lower activation energy. A catalyst speeds up a reaction, but it is not consumed during the process. The fundamental principle of catalysis is the ability of a catalyst to alter the reaction mechanism, often introducing a more efficient pathway than the uncatalyzed process.In a catalyzed reaction, the catalyst participates directly in the reaction mechanism. It interacts with reactants to form...
Heterogeneous Catalysis
Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
