作为容器分子的设计元素的同质异构;MCl2物种的结合,移位和选择性运输 (M = Pt, Pd, Ni)
Sugam Kharel1, Hemant Joshi1, Stephen Bierschenk1
1Department of Chemistry, Texas A&M University , P.O. Box 30012, College Station, Texas 77842-3012, United States.
Journal of the American Chemical Society
|January 12, 2017
概括
一种新型的二氨酸连接物促进了金属二化物 (MCl2) 在水和有机相之间有效的运输. 这一过程通过使用化物显著增强,使得选择性金属回收成为可能.
科学领域:
- 有机金属化学
- 协调化学
- 材料科学
背景情况:
- 桥头二氨酸表现出独特的同质异构.
- 外向导向的单双异构体可以与易斯酸性金属二化物 (MCl2) 协调.
- 使用MCl2形成状添加物 (M = Pt, Pd, Ni).
研究的目的:
- 为了研究金属二化物的二基连接体的运输能力.
- 探索相位转移条件和添加剂对金属运输效率的影响.
- 为了比较不同金属二化物的运输速度.
主要方法:
- 双桥头二素 ((CH2) 14) 3P的同质异构.
- 使用MCl2形成状添加物.
- 在金属运输中进行液体-液体提取实验.
- 使用二甲和水溶液进行相移研究.
- 分析金属运输动力学和平衡比率.
主要成果:
- 双素连接体有效地清除MCl2,形成稳定的添加物.
- 通过KCN等添加剂影响的平衡,实现了金属二化物跨相运输.
- 化物显著加快运输并改善平衡比率.
- 在混合系统中,二 (PdCl2) 的运输速度比二 (PtCl2) 快.
- 一个链条较长的类似物,P((CH2) 18) 3P,显示出类似的疗效.
结论:
- 桥头二素是不混合相之间的MCl2运输的有效配体.
- 使用KCN作为添加剂显著提高了运输效率和选择性.
- 这种系统为选择性金属回收和分离提供了一个有前途的方法.
相关概念视频
Stereoisomerism
14.3K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
14.3K
Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration
9.8K
The rate of acid-catalyzed hydration of alkenes depends on the alkene's structure, as the presence of alkyl substituents at the double bond can significantly influence the rate.
9.8K
Regioselectivity of Electrophilic Additions to Alkenes: Markovnikov's Rule
18.0K
If a set of reactants can yield multiple constitutional isomers, but one of the isomers is obtained as the major product, the reaction is said to be regioselective. In such reactions, bond formation or breaking is favored at one reaction site over others.
The hydrohalogenation of an unsymmetrical alkene can yield two haloalkane products, depending on which vinylic carbon takes up the halogen. However, one product usually predominates, where hydrogen adds to the vinylic carbon bearing the...
The hydrohalogenation of an unsymmetrical alkene can yield two haloalkane products, depending on which vinylic carbon takes up the halogen. However, one product usually predominates, where hydrogen adds to the vinylic carbon bearing the...
18.0K
Disubstituted Cyclohexanes: cis-trans Isomerism
14.8K
Depending upon the different spatial orientation of the substituents, the disubstituted cycloalkanes exhibit two types of stereoisomers. The cis isomers have the substituents on the same side of the ring, whereas the trans isomers have the substituents on the opposite sides. These stereoisomers exhibit different physical properties and cannot be interconverted without breaking the carbon-carbon bonds.
In cyclohexane, the substituents can occupy different positions generating distinct isomers....
In cyclohexane, the substituents can occupy different positions generating distinct isomers....
14.8K
Isomerism
24.7K
Isomers are molecules with the same molecular formula but different structural arrangements. Isomers can be further classified into constitutional isomers and stereoisomers. Constitutional isomers differ in the connectivity of their constituent atoms. For example, 2-butanol and diethyl ether are constitutional isomers, as they have the same chemical formula, C4H10O, but differ in the connectivity of the carbon and oxygen atoms. Constitutional isomers have different physical and chemical...
24.7K
Structural Isomerism
22.3K
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...
22.3K


