一个单一的碳原子控制了CoII(N2S2) 复合物的几何和反应性
Manish Jana1, Manuel Quiroz1, Marcetta Y Darensbourg1
1Department of Chemistry, Texas A&M University, College Station, Texas-77843, USA. marcetta@chem.tamu.edu.
Chemical communications (Cambridge, England)
|January 5, 2024
概括
在N-to-N连接器中,不同的碳链长度会产生不同的复合体. 这些复合物与碳基具有不同的反应性,突出显示了硫单对核性和化学反应中的结构控制的作用.
科学领域:
- 协调化学 协调化学
- 有机金属化学 有机金属化学
- 无机化学 无机化学 有机化学
背景情况:
- 用-硫联体合成和表征金属复合物对于理解协调化学至关重要.
- 这些复合物的电子和结构性质会影响它们的反应性和潜在应用.
研究的目的:
- 研究N-to-N连接器长度对复合物的形成和特性的影响.
- 为了探索这些复合物的与碳衍生物的反应性.
- 阐明酸硫单对核性和结构因素在决定反应结果中的作用.
主要方法:
- 合成使用不同碳N-to-N连接器的单体和二元复合物.
- 由此产生的N2S2Co(II) 复合物的表征,包括磁感应度的测量.
- 复合物的反应与易斯酸受体,特别是碳化合物 (W0(CO) 3和W0(CO) 4).
- 分析衍生产品以推断反应性和结构信息.
主要成果:
- 三碳连接器产生单体,四面体N2S2Co(II) 复合体 (μeff = 4.24 BM).
- 两个碳连接器的结果是二维,二磁性[N2S2) Co (II) ]2复合体.
- 当与W0(CO) 3和W0(CO) 4反应时,观察到不同的衍生产物,这表明酸硫单对核友性的差异.
- 单质复合体和二元复合体之间的结构差异影响了它们的反应性.
结论:
- N-to-N连接器的长度是确定复合物的核性和磁性特性的关键因素.
- 在复合体中,酸硫单双的核友性对它们的协调环境敏感,并影响与易斯酸的反应.
- 结构控制在与碳衍生物观察到的反应模式中发挥着重要作用.
更多相关视频
相关概念视频
02:42Valence Bond Theory
8.6K
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...
8.6K
02:57Coordination Number and Geometry
15.8K
For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
15.8K
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
02:46Covalent Bonding and Lewis Structures
49.3K
Compared to ionic bonds, which results from the transfer of electrons between metallic and nonmetallic atoms, covalent bonds result from the mutual attraction of atoms for a “shared” pair of electrons.
49.3K
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
02:54Lewis Structures of Molecular Compounds and Polyatomic Ions
34.8K
To draw Lewis structures for complicated molecules and molecular ions, it is helpful to follow a step-by-step procedure as outlined:
34.8K