Video Experimental Relacionado
Updated: Aug 4, 2025
09:44
Design, Synthesis, and Photochemical Properties of Clickable Caged Compounds
Published on: October 15, 2019
12.3K
Estrategia sintética de "caminar en jaula" para jaulas supramoleculares poco comunes
Xin-Ran Liu1, Peng-Fei Cui1, Shu-Ting Guo1
1State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200433, P. R. China.
Journal of the American Chemical Society
|April 6, 2023
Resumen
Los investigadores desarrollaron un nuevo método para crear jaulas supramoleculares utilizando acoplamiento B-C y "caminar en jaula" en autoensamblaje de coordinación. Esta técnica permite la construcción ajustable del metal y ofrece nuevas oportunidades en la química supramolecular.
Área de la Ciencia:
- Química supramolecular
- Química de coordinación
- Síntesis orgánica
Sus antecedentes:
- El desarrollo de nuevos métodos de ensamblaje para compuestos supramoleculares es un desafío significativo.
- Los métodos existentes pueden carecer de control sobre el tamaño y la estructura de las arquitecturas supramoleculares resultantes.
Objetivo del estudio:
- Introducir una estrategia innovadora para la construcción de jaulas supramoleculares.
- Explorar la integración del acoplamiento B-C y el "caminar en jaula" en el autoensamblaje de coordinación.
Principales métodos:
- Utilizando enlaces de dipiridina con alquinos para reaccionar con esqueletos de carborano metalizados.
- Utilizando acoplamiento B-C seguido de un proceso de "caminar en jaula" para formar jaulas metálicas.
- Investigar el efecto de la longitud del vinculante y la denticidad del ligando en la formación de la jaula.
Principales resultados:
- Construcción exitosa de jaulas metálicas mediante la integración del acoplamiento B-C y el "caminar en jaula".
- Se demostró que los enlaces de dipiridina sin alquinas producen metaciclos.
- Se ha demostrado que el tamaño de la capa metálica se puede regular ajustando la longitud del enlace de la bipiridina de alquinilo.
- Se informó de la formación de una nueva estructura de ravel cuando se utilizan enlaces tridentato-piridina.
Conclusiones:
- La estrategia descrita ofrece un principio prometedor para la síntesis de metallacages.
- La metalización de los carboranos, el acoplamiento B-C y el "caminar en jaula" son cruciales para esta reacción.
- Este trabajo abre nuevas vías en el campo de la química supramolecular.
Videos de Conceptos Relacionados
![[3,3] Sigmatropic Rearrangement of 1,5-Dienes: Cope Rearrangement](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2Ffiles%2Fmedia%2Fscience-education%2Fscience-education-thumbs%2F12422.jpg&w=3840&q=75)
01:21[3,3] Sigmatropic Rearrangement of 1,5-Dienes: Cope Rearrangement
2.8K
The Cope rearrangement is classified as a [3,3] sigmatropic shift in 1,5-dienes, leading to a more stable, isomeric 1,5-diene. The reaction involves a concerted movement of six electrons, four from two π bonds and two from a σ bond, via an energetically favorable chair-like transition state.
2.8K
02:02Chair Conformation of Cyclohexane
14.8K
The chair conformation is the most stable form of cyclohexane due to the absence of angle and torsional strain. The absence of angle strain is a result of cyclohexane’s bond angle being very close to the ideal tetrahedral bond angle of 109.5° in its chair conformer. Similarly, the torsional strain is also absent owing to the perfectly staggered arrangement of bonds.
The hydrogen atoms linked to carbons are arranged in two different axial and equatorial orientations to achieve this...
The hydrogen atoms linked to carbons are arranged in two different axial and equatorial orientations to achieve this...
14.8K
02:11Conformations of Cyclohexane
12.7K
Cyclohexane does not exist in a planar form due to the high angle and torsional strain it would experience in the planar structure. Instead, it adopts non-planar chair and boat conformations.
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...
12.7K
02:33Stereoisomerism 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
02:30Stability of Substituted Cyclohexanes
12.7K
This lesson discusses the stability of substituted cyclohexanes with a focus on energies of various conformers and the effect of 1,3-diaxial interactions.
The two chair conformations of cyclohexanes undergo rapid interconversion at room temperature. Both forms have identical energies and stabilities, each comprising equal amounts of the equilibrium mixture. Replacing a hydrogen atom with a functional group makes the two conformations energetically non-equivalent.
For example, in...
The two chair conformations of cyclohexanes undergo rapid interconversion at room temperature. Both forms have identical energies and stabilities, each comprising equal amounts of the equilibrium mixture. Replacing a hydrogen atom with a functional group makes the two conformations energetically non-equivalent.
For example, in...
12.7K