合成,表征和结构分析的复合物从 2,2':6',2''-二衍生物与过渡金属
Daniel A Fajardo1, Danny Arteaga1, Javier Ellena2
1Grupo de Investigación Química de Productos Naturales (QPN), Facultad de Ciencias Naturales, Exactas y de la educación, Universidad del Cauca, Popayán 19003, Colombia.
概括
这项研究报告了新型协调复合物的合成和表征,使用替代的特皮里丁配体和双价过渡金属. 由此产生的复合体呈现出扭曲的八面体几何形状,晶体包装受C-H...π相互作用的影响.
科学领域:
- 协调化学 协调化学
- 材料科学 材料科学 材料科学
- 超分子化学 超分子化学
背景情况:
- 二连接物是协调化学中的多功能构建块.
- 替代的特皮里丁具有可调节的电子和硬质性质.
- 双价过渡金属复合物与特皮里丁配体在各种领域都有应用.
研究的目的:
- 综合和结构性地描述新的协调复合体.
- 为了研究,和甲基替代剂对特皮里丁配体的影响.
- 为了探索Co (II),Fe (II),Mn (II) 和Ni (II) 与这些配体的协调行为.
主要方法:
- 连接物合成: 4'--2,2':6',2''-二 (Ph-TPY), 4'-(4-二) -2':6',2''-二 (ClPh-TPY) 和 4'-(4-甲基) -2':6',2''-二 (MeOPh-TPY). 连接物合成: 4'--2,2':6',2''-二 (Ph-TPY), 4'-(4-二) -2':6',2''-二 (ClPh-TPY) 和 4'-(4-甲基) -2':6',2''-二.
- 复杂合成:金属盐与连接体的反应,金属与连接体的比率为1:2.
- 结构特征:单晶X射线衍射,FT-IR,UV-Vis,NMR光谱学. 结构特征:单晶X射线衍射,FT-IR,UV-Vis,NMR光谱学.
- 热分析:热重力测量分析 (TGA) 和差分扫描热量计 (DSC).
主要成果:
- 复合物的成功合成的一般公式是[M(R-TPY) ]2[ClO4) 2.2.
- 单晶X射线衍射证实了对选定复合体的扭曲八面体协调多面体.
- 这些复合体中的晶体包装主要由弱C-H...π相互作用控制.
- 对合成的化合物进行了全面的光谱和热特性分析.
结论:
- 这项研究成功地合成和表征了一系列新的协调复合体.
- 这些复合物的结构和超分子特征得到了阐明.
- 这些发现有助于理解基于特皮里丁的金属复合体中的结构性质关系.
更多相关视频
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
02:52Stereoisomerism
11.8K
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...
11.8K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
42.4K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
42.4K
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
01:19Complexation Equilibria: The Chelate Effect
505
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...
505
02:58Crystal Field Theory - Octahedral Complexes
26.4K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
26.4K