N-氧化物-胺酸复合物
Hanhua Xu1, Ze-Jie Lv1, Xiao Chen1
1Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China.
Inorganic chemistry
|March 8, 2024
概括
一种新型的N-aryloxide-amidine连接体被用于动因子化学. 这种连接物促进了独特的复合物的形成,具有独特的结构安排和氧化还原特性.
科学领域:
- 有机金属化学 有机金属化学
- 无机化学 无机化学
- 动因化物化学 动因化物化学
背景情况:
- 开发多功能连接体对于探索行为因子的协调化学是至关重要的.
- N-氧化物-阿米丁配体提供了一个独特的组合的供体原子的金属复合.
研究的目的:
- 通过N-aryloxide-amidine连接体合成和表征新型的行为体复合物.
- 为了研究从这种连接体中衍生出来的复合物的结构多样性和电子特性.
主要方法:
- 合成一个N-氧化物-阿米丁配体 ([ONNO]).
- 联体与四化物 (ThCl4(DME) 的反应2) 形成二聚复合物 2.
- 用KCp*对复合体2进行进一步的功能化,从而产生复合体4.
- 涉及KC8的复合2和双二的氧化研究,以产生激素和二子物种 (5和6).
主要成果:
- 该N-氧化物-阿米丁连接体成功形成了二度复合体 (2和4).
- 综合体2展示了氧化物臂与不同中心的桥梁协调.
- 复合物4显示了氧化物两臂的化到一个单一的中心.
- 在双二的存在下对复合物2进行氧化处理,导致激素和二离子-双复合物的形成 (5和6).
结论:
- [ONNO]连接体有效地稳定了各种协调环境.
- 这种连接体使得具有可调节电子性质的结构上不同的复合物的形成成为可能.
- 这项工作扩大了用于活性化物化学和氧化还原操纵的连接体设计的范围.
相关概念视频
02:42Valence Bond Theory
8.5K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
8.5K
02:54Coordination Compounds and Nomenclature
21.4K
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...
21.4K
02:34Structural Isomerism
19.2K
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...
19.2K
02:42Acidity of 1-Alkynes
9.8K
The acidic strength of hydrocarbons follows the order: Alkynes > Alkenes > Alkanes. The strength of an acid is commonly expressed in units of pKa — the lower the pKa, the stronger the acid. Among the hydrocarbons, terminal alkynes have lower pKa values and are, therefore, more acidic. For example, the pKa values for ethane, ethene, and acetylene are 51, 44, and 25, respectively, as shown here.
9.8K
01:19Complexation Equilibria: The Chelate Effect
514
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...
514
03:02Colors and Magnetism
11.7K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
11.7K