结构异构体的二-p-二基thioctaphyrins 的结构异构体
Vratta Grover1, Mangalampalli Ravikanth1
1Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India. ravikanth@chem.iitb.ac.in.
Organic & biomolecular chemistry
|October 9, 2023
概括
研究人员合成和表征了二-p-二二甲酸的 cis 和 trans 异构体. 这两种异构体都是稳定的,非芳香的宏循环,具有独特的结构和电子特性,经实验和理论研究证实.
科学领域:
- 有机化学 有机化学
- 超分子化学 超分子化学
- 计算化学计算化学
背景情况:
- -p-二西八氨酸是宏环化合物,在材料科学中具有潜在的应用.
- 了解其同位体的结构和电子特性对于有针对性的合成和应用至关重要.
研究的目的:
- 合成和表征二-p-二二八氨酸的 cis 和 trans 结构异构体.
- 通过实验和计算方法阐明这些异构体的结构,光谱和氧化还原特性.
主要方法:
- 从易于获得的前体中以酸催化合成宏循环.
- 使用基本柱染色学分离异构体.
- 使用1D和2DNMR光谱学进行结构阐明.
- 使用密度函数理论 (DFT) 和时间依赖 DFT (TD-DFT) 研究进行符合性分析和电子属性调查.
主要成果:
- 成功合成和分离 cis 和 trans di-p-benzidithiaoctaphyrin 异构体.
- 两种异构体都采用了八的形状,而变异异构体呈现出更大的扭曲.
- 实验和理论数据证实,这两种异构体都是稳定的,非芳香的宏循环.
- 在异构体之间观察到光谱和氧化还原性质的微妙差异.
- 在可见NIR区域中确定了富含电子的性质和非芳香吸收特征.
结论:
- 这项研究成功地合成和表征了cis和trans di-p-benzidithiaoctaphyrin异构体.
- 每个同位素都有不同的结构和电子特性,为未来的分子设计提供了洞察力.
- 这些发现有助于理解复杂的宏观循环系统中的结构属性关系.
更多相关视频
相关概念视频
Stereoisomerism
12.0K
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...
12.0K
Structural Isomerism
19.3K
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...
19.3K
Nomenclature of Aromatic Compounds with Multiple Substituents
7.9K
When more than one substituent is present on the benzene ring, the IUPAC nomenclature depends on the number of substituents present.
For disubstituted benzene derivatives, with two groups attached to the benzene ring, three constitutional isomers are possible. For example, consider dimethyl benzene, often called xylene, where the second methyl group can be substituted at the second, third, or fourth carbon. The relative position of the substituents is represented by prefixes ortho, meta, or...
For disubstituted benzene derivatives, with two groups attached to the benzene ring, three constitutional isomers are possible. For example, consider dimethyl benzene, often called xylene, where the second methyl group can be substituted at the second, third, or fourth carbon. The relative position of the substituents is represented by prefixes ortho, meta, or...
7.9K
Structure of Conjugated Dienes
5.2K
Introduction
Conjugated dienes are compounds characterized by the presence of alternating double and single bonds. In a conjugated system like 1,3-butadiene, the unhybridized 2p orbital on each carbon overlaps continuously, allowing the π electrons to be delocalized across the entire molecule. In contrast, this type of overlap does not occur in cumulated and isolated dienes, such as 2,3-pentadiene and 1,4-pentadiene, respectively. Instead, the π electrons remain localized between the double...
Conjugated dienes are compounds characterized by the presence of alternating double and single bonds. In a conjugated system like 1,3-butadiene, the unhybridized 2p orbital on each carbon overlaps continuously, allowing the π electrons to be delocalized across the entire molecule. In contrast, this type of overlap does not occur in cumulated and isolated dienes, such as 2,3-pentadiene and 1,4-pentadiene, respectively. Instead, the π electrons remain localized between the double...
5.2K
Stereoisomerism of Cyclic Compounds
9.0K
In this lesson, we delve into the role of ring conformation and its stability, which determines the spatial arrangement and, consequently, the molecular symmetry and stereoisomerism of cyclic compounds. 1,2-Dimethylcyclohexane is used as a case study to evaluate the possible number of stereoisomers. Here, given the multiple (n = 2) chiral centers, there are 2n = 4 possible configurations that lack a plane of symmetry, as the ring skeleton exists in a non-planar chair conformation. In addition,...
9.0K
Isomerism
18.6K
Isomers are molecules with the same molecular formula but different structural arrangements. Isomers can be further classified into constitutional isomers and stereoisomers. Constitutional isomers differ in the connectivity of their constituent atoms. For example, 2-butanol and diethyl ether are constitutional isomers, as they have the same chemical formula, C4H10O, but differ in the connectivity of the carbon and oxygen atoms. Constitutional isomers have different physical and chemical...
18.6K


![Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F60786.jpg&w=3840&q=50)