连接体触觉性的变化促进了易斯基解离
Payton A Fortuna1, Leslie S G Kelley1, Yipeng Sun2
1Department of Chemistry, The University of Western Ontario, London, N6A 3K7, Canada. tsham@uwo.ca.
Dalton transactions (Cambridge, England : 2003)
|January 22, 2026
概括
这项研究引入了一种新型的素1-azaallyl连接体 (L2),可以控制可逆的易斯基协调. 这个连接体是连接体.
科学领域:
- 有机金属化学 有机金属化学
- 协调化学 协调化学
- 催化剂是一种催化剂.
背景情况:
- 接体设计对于控制金属复合物的反应性至关重要.
- 配合体中的可调的触觉性为反应控制提供了新的途径.
- 可逆基质协调是催化循环中的关键.
研究的目的:
- 介绍和描述一种新的素1-azaallyl连接物 (L2).
- 为了证明易斯基的联结体控制的可逆协调.
- 阐明连接体重组和基质结合/解离的机制.
主要方法:
- 素1-azaallyl连接物L2.2的合成和表征.
- 对甲基复合物[Pd(CH3)(L2) ]与二烯的研究.
- 光谱技术包括13C{1H}和1H-31P HMBC NMR.
- 在X射线吸收光谱学 (XAS).
- 密度函数理论 (DFT) 的计算.
主要成果:
- 接体L2通过改变其结合方式 (触动性) 来实现易斯基 (例如,皮里丁) 的可逆协调.
- 在[Pd(CH3)(L2) ]中,L2采用 κ1-P;η3-NCC 协调模式.
- 二胺结合诱导转换到 κ2-PN 模式,在恢复到原始模式时促进二胺解离.
- 实验和计算方法证实了这些相互转换.
结论:
- 已经证明了可逆基质协调的联体受控机制.
- 可调节的连接体结合模式提供了一种控制有机金属复合体反应性的策略.
- 这项工作为动态协调化学的连接体设计提供了洞察力.
相关概念视频
02:33Lewis Acids and Bases
48.2K
In 1923, G. N. Lewis proposed a generalized definition of acid-base behavior in which acids and bases are identified by their ability to accept or to donate a pair of electrons and form a coordinate covalent bond.
A coordinate covalent bond (or dative bond) occurs when one of the atoms in the bond provides both bonding electrons. For example, a coordinate covalent bond occurs when a water molecule combines with a hydrogen ion to form a hydronium ion. A coordinate covalent bond also results when...
A coordinate covalent bond (or dative bond) occurs when one of the atoms in the bond provides both bonding electrons. For example, a coordinate covalent bond occurs when a water molecule combines with a hydrogen ion to form a hydronium ion. A coordinate covalent bond also results when...
48.2K
02:16Lewis Acids and Bases
16.8K
This lesson delves into Lewis acids and bases in the context of the octet rule for electron-deficient compounds. Here, the concept is discussed, emphasizing the group 13 elements like boron or aluminium. Since group 13 elements possess three valence electrons, they form trivalent compounds with a sextet of electrons and a vacant orbital for the central atom. Consequently, these electron-deficient compounds accept electrons from other species to complete their octet in a chemical reaction. They...
16.8K
02:51Metal-Ligand Bonds
24.1K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
24.1K
02:36Lewis Symbols and the Octet Rule
80.3K
Chemical bonds are complex interactions between two or more atoms or ions, which reduce the potential energy of the molecule. Gilbert N. Lewis developed a model called the Lewis model that simplified the depiction of chemical bond formation and provided straightforward explanations for the chemical bonds seen in most common compounds.
80.3K
02:46Covalent Bonding and Lewis Structures
60.8K
Compared to ionic bonds, which results from the transfer of electrons between metallic and nonmetallic atoms, covalent bonds result from the mutual attraction of atoms for a “shared” pair of electrons.
60.8K
02:54Lewis Structures of Molecular Compounds and Polyatomic Ions
44.9K
To draw Lewis structures for complicated molecules and molecular ions, it is helpful to follow a step-by-step procedure as outlined:
44.9K