双金属复合物与2,6-Dipicolinoylbis (N),N-Dialkylthioureas) 结合在一起
Christelle Njiki Noufele1, Dennis Schulze1, Maximilian Roca Jungfer2
1Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, 14195 Berlin, Germany.
Molecules (Basel, Switzerland)
|November 9, 2024
概括
这项研究详细介绍了使用 2,6-dipicolinoylbis ((N,N-dialkylthioureas) 连接物合成新型乌兰复合物. 该研究探讨了单体和二元结构的形成,以及创建独特的双金属和寡金属化合物,在协调化学中具有潜在的应用.
科学领域:
- 协调化学 协调化学
- 有机金属化学 有机金属化学
- 化学 的化学
背景情况:
- 乌拉尼尔复合物由于其独特的协调特性而引起人们的兴趣.
- 2,6-Dipicolinoylbis ((N,N-dialkylthioureas) 连接体提供了多功能协调位点.
- 双金属和寡金属烯复合物的勘探仍然是一个活跃的研究领域.
研究的目的:
- 合成和表征新型单体和二体乌兰复合物.
- 为了研究 2,6-dipicolinoylbis ((N,N-dialkylthioureas) 配合 2,6-dipicolinoylbis ((N,N-dialkylthioureas) 配合离子的协调行为.
- 通过利用无协调的硫原子来探索双金属和小金属复合物的形成.
主要方法:
- 使用 2,6-dipicolinoylbis ((N,N-dialkylthioureas) 连接物和乌拉尼尔盐合成乌拉尼尔复合物.
- 预制的乌拉尼尔复合物的反应与各种金属盐 (例如,黄金,,过渡金属).
- 广泛的光谱分析 (例如,NMR,IR) 和X射线衍射用于结构阐明.
主要成果:
- 成功合成了单体 ([UO2(LR) ((solv)) 和二体 ([{UO2(LR) ((μ-OMe)) 2-2) anyl复合体.
- 证明乌拉尼尔离子通过硬的O,N,O或N,N,N捐赠体集进行协调,硫原子保持不协调.
- 制备各种双金属和寡金属复合物,包括含金,和过渡金属 (Zn,Ni,Co,Fe,Mn,Cd) 的例子.
结论:
- 2,6-Dipicolinoylbis ((N,N-dialkylthioureas) 连接物有效地协调乌兰离子,形成多样化的结构.
- 在乌兰复合体中存在无协调的硫原子,为构建多金属系统提供了一个平台.
- 合成的双金属和小金属烯复合体展示了新的协调架构,并扩大了烯化学的范围.
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
00:43Complexometric Titration: Ligands
916
Different monodentate and polydentate ligands are used as complexing agents in complexometric titration reactions. The formation of complexes by mono- and bidentate ligands involves two or more intermediate steps, limiting their use as complexing agents. In comparison, polydentate ligands can form complexes with metal ions in a single-step process, facilitating sharper end points. This means polydentate ligands, such as amino carboxylic acid derivatives, are most commonly employed in...
916
01:19Complexation Equilibria: The Chelate Effect
463
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...
463
03:02Colors and Magnetism
11.5K
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...
11.5K
02:51Metal-Ligand Bonds
20.6K
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...
20.6K
01:22EDTA: Chemistry and Properties
1.8K
Polydentate ligands are most widely used in complexometric titrations because they form more stable complexes with the metal ions than mono- or bidentate ligands due to the chelate effect. Examples of polydentate ligands are ethylenediaminetetraacetic acid (EDTA), crown ethers, and cryptands. The most important feature of optimal polydentate ligands is the ability to form 1:1 complexes in a single-step process. Amino carboxylic acid derivatives are frequently used as complexing agents. EDTA is...
1.8K