-氧化-胺酸4组金属复合物
Hanhua Xu1, Ze-Jie Lv1, Junnian Wei1
1Beijing National Laboratory for Molecular Sciences (BNLMS), MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing, China. jnwei@pku.edu.cn.
Dalton transactions (Cambridge, England : 2003)
|August 7, 2023
概括
一种新的N-氧化物-阿米丁连接体被合成并与4组金属化物反应,形成二元金属复合体. 协调模式和电子结构因金属离子大小而异,影响了连接体结合和反应性.
科学领域:
- 有机金属化学 有机金属化学
- 协调化学 协调化学
- 连接体设计 连接体设计
背景情况:
- 合成N-氧化物-阿米丁配体对于开发新的协调化合物至关重要.
- 第4组金属复合物因其催化和材料特性而受到广泛研究.
研究的目的:
- 为了合成一种新型的N-氧化物-阿米丁配体 (H3L).
- 研究H3L与4组金属化物 (MIVCl4) 的协调行为.
- 探索由此产生的二维复合体 (LMIV-Cl) 的结构和电子变化2.
主要方法:
- 两个步骤合成的N-氧化物-阿米丁配体.
- 脱联体与4组金属四化物 (Ti,Zr,Hf) 的反应.
- 使用光谱和晶体学技术对产生的二维金属复合体进行表征.
- 哈夫复合物的进一步反应与HfCl4和亚源形成双核金属亚.
主要成果:
- 成功合成了H3L连接体.
- 基于金属离子半径的不同协调模式的二维复合体 (LMIV-Cl) 2的形成.
- 在和/哈夫复合体之间观察到ArO臂协调和胺酸部分C-N键定位的差异.
- 一个双核哈夫氧化物复合物的合成,具有改变的氨基酸氨基酸协调模式.
结论:
- 该N-氧化物-阿米丁连接体表现出与4组金属的多功能协调行为.
- 金属离子的大小显著影响由此产生的复合物的结构和电子性质.
- 连接体框架可以进一步功能化,产生更复杂的多核金属物种.
相关概念视频
Properties of Organometallic Compounds
1.0K
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.
1.0K
Metal-Ligand Bonds
21.0K
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...
21.0K
Coordination Compounds and Nomenclature
21.6K
In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
21.6K
Structural Isomerism
19.4K
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...
19.4K
Complexation Equilibria: Factors Influencing Stability of Complexes
402
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
402
Complexation Equilibria: The Chelate Effect
553
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
553


