単核のノンヘム・マンガネス (III) -ヨドシラレン複合体の構造と反応性
Donghyun Jeong1, Takehiro Ohta2, Jaeheung Cho1
1Department of Emerging Materials Science , DGIST , Daegu 42988 , Korea.
Journal of the American Chemical Society
|November 9, 2018
まとめ
研究者らは,金属触媒の重要な中間物質である新しいマンガン (III) -ヨドシラーン複合体を特徴付けました. この複合体は,C-H活性化,硫化,エポキシデーションなどの酸化反応を促進し,過渡金属化学を進める.
科学分野:
- 有機金属化学
- キャタリシス
- 酸化反応
背景:
- 移行金属-ヨドシラレン複合体は,ヨドシラレンを含む金属触媒反応における重要な中間物質である.
- これらの中間物質を理解することは,新しい触媒プロセスを開発するために不可欠です.
研究 の 目的:
- 最初のX線結晶構造と単核非ヘムマンガネス (III) -イオドシラレン複合体のスペクトル学的特徴を報告する.
- 酸化反応におけるこの新しいマンガンイオドシラレン中間物質の反応性とメカニズム的側面を調査する.
主な方法:
- 構造の決定のためのX線結晶学.
- スペクトル解析 (UV-Vis,EPRなど)
- イソトープの標識とハメット相関を含む運動学的研究で,反応のメカニズムを調査する.
主要な成果:
- 単核非ヘムマンガネス (MnIII) -ヨドシラレン複合体 (TBDAP) (OIPh) (OH) 2+) を成功して合成し,特徴づけました.
- C-H結合活性化,硫化,エポキシデーションを含む酸化反応を触媒化する複合体の能力を実証した.
- 運動データは,マンガンイオドシラレン添加物の電離性を確認した.
結論:
- 特徴づけられたマンガネス (III) -ヨドシラレン複合体は,移行金属触媒における重要な新しい中間物質を表しています.
- この発見は,マンガン媒介の酸化化学の範囲を拡大し,触媒機構の洞察を提供します.
- この複合体は,有機化学における新しい合成方法論を開発する可能性を秘めています.
関連する概念動画
02:34Structural Isomerism
21.7K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
21.7K
01:32Assembly of Complex Microtubule Structures
2.5K
Complex microtubule structures are present in resting cells and in dividing cells. In resting cells, they are responsible for maintaining the cellular architecture, tracks for intracellular transport, positioning of organelles, assembly of cilia and flagella. They mediate the bipolar spindle assembly for chromosomal segregation and positioning of the cell division plate in dividing cells. The formation of microtubule complex structures depends on the cell type, cell stage, and cell function.
2.5K
01:43Electron Transport Chain: Complex III and IV
9.3K
During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...
9.3K
02:58Crystal Field Theory - Octahedral Complexes
30.8K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
30.8K
03:45Formation of Complex Ions
26.1K
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...
26.1K
00:42Cross-reactivity
33.0K
Overview
33.0K