Jove
Visualize
Contáctanos
JoVE
x logofacebook logolinkedin logoyoutube logo
ACERCA DE JoVE
Visión GeneralLiderazgoBlogCentro de Ayuda JoVE
AUTORES
Proceso de PublicaciónConsejo EditorialAlcance y PolíticasRevisión por ParesPreguntas FrecuentesEnviar
BIBLIOTECARIOS
TestimoniosSuscripcionesAccesoRecursosConsejo Asesor de BibliotecasPreguntas Frecuentes
INVESTIGACIÓN
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchivo
EDUCACIÓN
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualCentro de Recursos para ProfesoresSitio de Profesores
Términos y Condiciones de Uso
Política de Privacidad
Políticas

Videos de Conceptos Relacionados

Aromatic Hydrocarbon Cations: Structural Overview01:18

Aromatic Hydrocarbon Cations: Structural Overview

2.9K
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group...
2.9K
Aromatic Hydrocarbon Anions: Structural Overview01:18

Aromatic Hydrocarbon Anions: Structural Overview

2.9K
Neutral hydrocarbons like cyclopentadiene with an odd number of carbon atoms and one intervening CH2 group in the ring are not aromatic. Cyclopentadiene with 4 π electrons does not satisfy the 4n + 2 π electron rule. Additionally, the intervening CH2 group is sp3 hybridized and lacks a vacant p orbital, thereby interrupting the overlap of p orbitals in a continuous manner and preventing the delocalization of π electrons throughout the ring.
Due to the absence of continuous...
2.9K
Structure of Conjugated Dienes01:16

Structure of Conjugated Dienes

5.4K
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...
5.4K
Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry01:29

Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry

4.7K
Diels–Alder reactions between cyclic dienes locked in an s-cis configuration and dienophiles yield bridged bicyclic products.
4.7K
Criteria for Aromaticity and the Hückel 4n + 2 Rule01:20

Criteria for Aromaticity and the Hückel 4n + 2 Rule

11.0K
Like benzene, cyclobutadiene and cyclooctatetraene are cyclic compounds with alternate single and double bonds. However, their chemical behavior differs from benzene, as they are unstable and not aromatic. So, what are the structural characteristics of unsaturated compounds categorized as aromatic?  
For the first time, Eric Hückel, a German chemical physicist, derived a set of structural features for a compound to be classified as aromatic. This is now known as...
11.0K
Halogenation of Alkenes02:46

Halogenation of Alkenes

16.1K
Halogenation is the addition of chlorine or bromine across the double bond in an alkene to yield a vicinal dihalide. The reaction occurs in the presence of inert and non-nucleophilic solvents, such as methylene chloride, chloroform, or carbon tetrachloride.
Consider the bromination of cyclopentene. Molecular bromine is polarized in the proximity of the π electrons of cyclopentene. An electrophilic bromine atom adds across the double bond, forming a cyclic bromonium ion intermediate.
16.1K

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por
Same author

Development and validation of a nomogram prediction model for sleep disorders in elderly Parkinson disease patients based on multidimensional data: A retrospective case-control study.

Medicine·2026
Same author

Homolytic dissociation of a Ge(I) dimer to a monomeric Ge(I) radical.

Chemical communications (Cambridge, England)·2026
Same author

A portable sensing platform enabled by permanganate-peroxide coupling for time-resolved analysis of xanthine oxidase activity in circulating tumor cells.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy·2026
Same author

Carbene-Mediated Photoconversion of Cellulose Diacetate.

ACS nano·2026
Same author

Factors associated with willingness to receive influenza vaccination among adults in Shanghai, China: a study based on the health belief model.

BMC public health·2026
Same author

Rapid quantification of oxidation indicators in fish oil by digital image colourimetry.

Analytical methods : advancing methods and applications·2026

Video Experimental Relacionado

Updated: Aug 19, 2025

Efficient Construction of Drug-like Bispirocyclic Scaffolds Via Organocatalytic Cycloadditions of α-Imino γ-Lactones and Alkylidene Pyrazolones
10:17

Efficient Construction of Drug-like Bispirocyclic Scaffolds Via Organocatalytic Cycloadditions of α-Imino γ-Lactones and Alkylidene Pyrazolones

Published on: February 7, 2019

7.0K

Diboradisilaciclobuteno neutro homoaromático: síntesis, estructura y reactividad

Yu Zhang1, Linlin Wu2, Hao Wang1

  • 1School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China.

Journal of the American Chemical Society
|December 2, 2022
PubMed
Resumen

Los investigadores sintetizaron un nuevo diboradisilaciclobuteno, el primero de su tipo con boro y silicio mezclados. Este compuesto presenta una homoaromaticidad de 2π, confirmada por análisis estructurales y computacionales.

Más Videos Relacionados

Synthesis of a Borylated Ibuprofen Derivative Through Suzuki Cross-Coupling and Alkene Boracarboxylation Reactions
08:56

Synthesis of a Borylated Ibuprofen Derivative Through Suzuki Cross-Coupling and Alkene Boracarboxylation Reactions

Published on: November 30, 2022

2.8K
Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy
07:36

Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy

Published on: November 9, 2019

8.1K

Videos de Experimentos Relacionados

Last Updated: Aug 19, 2025

Efficient Construction of Drug-like Bispirocyclic Scaffolds Via Organocatalytic Cycloadditions of α-Imino γ-Lactones and Alkylidene Pyrazolones
10:17

Efficient Construction of Drug-like Bispirocyclic Scaffolds Via Organocatalytic Cycloadditions of α-Imino γ-Lactones and Alkylidene Pyrazolones

Published on: February 7, 2019

7.0K
Synthesis of a Borylated Ibuprofen Derivative Through Suzuki Cross-Coupling and Alkene Boracarboxylation Reactions
08:56

Synthesis of a Borylated Ibuprofen Derivative Through Suzuki Cross-Coupling and Alkene Boracarboxylation Reactions

Published on: November 30, 2022

2.8K
Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy
07:36

Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy

Published on: November 9, 2019

8.1K

Área de la Ciencia:

  • Química organometálica
  • Ciencias de los materiales
  • Química computacional

Sus antecedentes:

  • El estudio de los compuestos homoaromáticos es crucial para comprender la deslocalización electrónica.
  • La química del boro y el silicio ofrece oportunidades únicas para nuevos enlaces y estructuras electrónicas.
  • Las investigaciones anteriores se han centrado en los sistemas homoaromáticos basados en carbono.

Objetivo del estudio:

  • Sintetizar y caracterizar un nuevo diboradisilaciclobuteno.
  • Para investigar la naturaleza homoaromática de este sistema mixto de anillos de boro y silicio.
  • Para explorar la reactividad del compuesto sintetizado.

Principales métodos:

  • Síntesis por reducción del borillaminobromosilano con grafito de potasio.
  • Caracterización estructural mediante difracción de rayos X de un solo cristal.
  • Análisis computacional utilizando la Teoría Funcional de la Densidad (DFT).

Principales resultados:

  • La preparación exitosa de un diboradisilaciclobuteno formalmente neutro.
  • El análisis de rayos X reveló un anillo plegado de B2Si2 con un enlace transanular de B-Si corto.
  • Los cálculos de DFT confirmaron la deslocalización de dos electrones π sobre la fracción BSi2, lo que indica una homoaromaticidad de 2π.
  • El compuesto reaccionó fácilmente con CuCl o HCl para formar diboradisilaciclobutanos.

Conclusiones:

  • El diboradisilaciclobuteno sintetizado es el primer análogo neutro mezclado de boro y silicio del ion homociclopropenilo.
  • El compuesto exhibe un carácter homoaromático 2π significativo debido a la deslocalización de electrones.
  • El estudio amplía el alcance de los sistemas homoaromáticos para incluir estructuras mixtas de boro y silicio.