(Ph3P) 6Cu6H6の酸化から生じるカチオン銅水素群
Shuo Liu1, Michael S Eberhart1, Jack R Norton1
1Department of Chemistry, Columbia University , 3000 Broadway, New York, New York 10027, United States.
Journal of the American Chemical Society
|May 31, 2017
まとめ
六核銅化水素クラスターからコバルトセニウム酸化物質への電子の移転は,最初の電子では迅速だが,第二の電子では著しく遅い. この研究では,結果として生じる酸化銅のクラスター構造とその合成について詳細に説明します.
科学分野:
- 有機金属化学
- 協調化学
- 電子移転反応
背景:
- (Ph3P) 6Cu 6H6のような六核銅化水素群は,独自の構造と反応性により興味深い.
- これらのクラスターにおける電子移転プロセスを理解することは,触媒と材料科学におけるその応用にとって極めて重要です.
研究 の 目的:
- (Ph3P) 6Cu6H6からCp*2Fe+への連続的な電子移転の運動学と熱力学を調査する.
- 酸化した銅水化物種の構造を特徴づける.
- これらの酸化したクラスターに代替合成経路を探求する.
主な方法:
- Cp*2Fe+を1電子の酸化剤として使用した電気化学的酸化試験.
- 電子移転速度の運動分析
- X線微分法による構造的特徴.
- 化学合成と特徴付け (微分析,変換反応)
主要な成果:
- (Ph3P) 6Cu6H6からの最初の電子移転は非常に速い (k > 10^6 L·mol^-1·s^-1).
- 2番目の電子移動は,より低い熱力学的駆動力により,かなり遅い (k = 9.29(4) × 10^3 L·mol^-1·s^-1), [(Ph3P) 6Cu6H5] +を形成する.
- X線 difraksionは,異なる酸化条件下で形成された[{Ph3P) 6Cu6H5]+のビテラエドール構造と[{Ph3P) 7Cu7H6]+のキャップされたオクタエドール構造を確認した.
結論:
- (Ph3P) 6Cu 6H6からの連続的な電子移転は,異なる運動および熱力学的プロファイルを示している.
- この研究は,酸化した銅水素群の詳細な構造の洞察を提供します.
- これらのクラスターへの代替合成経路が確立され,そのアクセシビリティが向上しました.
さらに関連する動画
関連する概念動画
Aromatic Hydrocarbon Cations: Structural Overview
4.1K
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group...
Removing one hydrogen from the intervening CH2 group...
4.1K
Acid Halides to Ketones: Gilman Reagent
4.2K
Lithium dialkyl cuprate, also known as Gilman reagents, selectively reduces acid halides to ketones. The acid chloride is treated with Gilman reagent at −78 °C in the presence of ether solution to produce a ketone in good yield.
As shown below, the mechanism proceeds in two steps. First, one of the alkyl groups of the reagent acts as a nucleophile and attacks the acyl carbon of the acid chloride to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen...
As shown below, the mechanism proceeds in two steps. First, one of the alkyl groups of the reagent acts as a nucleophile and attacks the acyl carbon of the acid chloride to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen...
4.2K
Coordination Number and Geometry
19.3K
For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
19.3K
Aldehydes and Ketones with HCN: Cyanohydrin Formation Mechanism
4.5K
Cyanohydrins are formed when cyanide nucleophiles and carbonyl compounds like aldehydes and ketones react. A strong base, the cyanide ion, catalyzes cyanohydrin formation. The ions are generated from HCN under aqueous conditions. Once the cyanide ions are generated, the first step involves the nucleophilic attack of the cyanide ions on the electrophilic carbonyl carbon. This attack shifts the π electrons from the C=O to the oxygen atom forming the alkoxide ion intermediate. The alkoxide anion...
4.5K
Extraction: Advanced Methods
1.2K
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
1.2K
Formation of Complex Ions
26.5K
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...
26.5K
![[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F59739.jpg&w=3840&q=50)

