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

Preparation of Alcohols via Addition Reactions02:15

Preparation of Alcohols via Addition Reactions

6.4K
Overview
The acid-catalyzed addition of water to the double bond of alkenes is a large-scale industrial method used to synthesize low-molecular-weight alcohols. An acidic atmosphere is required to allow the hydrogen in the water molecule to act as an electrophile and attack the double bond in an alkene. The addition of a proton to the double bond creates a carbocation intermediate. The proton preferentially bonds to the less substituted end of the double bond to create a more stable carbocation...
6.4K
Hydrogen Bonds01:04

Hydrogen Bonds

9.1K
A hydrogen bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom (for example, the oxygen in the water molecule) is attracted to another electronegative atom from another polar molecule, such as water (H2O), hydrogen fluoride (HF), or ammonia (NH3). The huge electronegativity difference between the H atom (2.1) and the atom to which it is bonded (4.0 for an F atom, 3.5 for an O atom, or 3.0 for an N atom), combined with the very small size of an H atom...
9.1K
Aldehydes and Ketones with Alcohols: Hemiacetal Formation01:19

Aldehydes and Ketones with Alcohols: Hemiacetal Formation

6.8K
Similar to water, alcohols can add to the carbonyl carbon of the aldehydes and ketones. The addition of one molecule of alcohol to the carbonyl compound forms the hemiacetal or half acetal. As depicted below, in a hemiacetal, the carbon is directly linked to an OH and OR group.
6.8K
Vicinal Diols via Reductive Coupling of Aldehydes or Ketones: Pinacol Coupling Overview01:27

Vicinal Diols via Reductive Coupling of Aldehydes or Ketones: Pinacol Coupling Overview

1.8K
Wilhelm Rudolph Fittig discovered the pinacol coupling reaction in 1859. It is a radical dimerization reaction and involves the reductive coupling of aldehydes or ketones in the presence of hydrocarbon solvent to yield vicinal diols.
1.8K
Acid-Catalyzed Dehydration of Alcohols to Alkenes02:35

Acid-Catalyzed Dehydration of Alcohols to Alkenes

20.7K
In a dehydration reaction, a hydroxyl group in an alcohol is eliminated along with the hydrogen from an adjacent carbon. Here, the products are an alkene and a molecule of water. Dehydration of alcohols is generally achieved by heating in the presence of an acid catalyst. While the dehydration of primary alcohols requires high temperatures and acid concentrations, secondary and tertiary alcohols can lose a water molecule under relatively mild conditions.
20.7K
¹H NMR: Long-Range Coupling01:27

¹H NMR: Long-Range Coupling

1.9K
The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene...
1.9K

También podría leer

Artículos Relacionados

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

Ordenar por
Same author

Microdroplet-Enabled Interfacial Electron Transfer Accelerates Schiff Base Condensation for Ultrafast Covalent Organic Framework Synthesis.

Journal of the American Chemical Society·2026
Same author

Syngas Production from Methane Reforming by Integrating Aqueous Microdroplets with Heterogeneous ZnO.

Journal of the American Chemical Society·2026
Same author

Electrostatic Confinement of Plasma Electrons by Water Microdroplets Enables Dinitrogen Oxidation.

Journal of the American Chemical Society·2026
Same author

Solid phosphate buffers boost CO<sub>2</sub> capture performance and enable energy-lean operation in amine-functionalized adsorbents.

Communications chemistry·2026
Same author

Tandem Photocatalytic H<sub>2</sub>O<sub>2</sub> Production and In Situ Upgrading Enabled by Docking and Locking Engineered Covalent Organic Frameworks.

Angewandte Chemie (International ed. in English)·2026
Same author

Selective Biomass Valorization via Cascade Photooxidation and Photothermal Hydride Shift.

Journal of the American Chemical Society·2026

Video Experimental Relacionado

Updated: Aug 26, 2025

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides CHIPS
06:34

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides CHIPS

Published on: June 20, 2014

13.9K

El enlace de hidrógeno promueve el acoplamiento C-C del alcohol

Zhuyan Gao1,2, Junju Mu1, Jian Zhang1

  • 1State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian116023, China.

Journal of the American Chemical Society
|October 10, 2022
PubMed
Resumen

El enlace de hidrógeno estabiliza los radicales reactivos durante la fotocatálisis, mejorando la producción química sostenible. Este método mejora la velocidad de acoplamiento y la selectividad para producir productos químicos valiosos como el 2,3-butanodiol.

Más Videos Relacionados

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
Retropinacol/Cross-pinacol Coupling Reactions - A Catalytic Access to 1,2-Unsymmetrical Diols
10:12

Retropinacol/Cross-pinacol Coupling Reactions - A Catalytic Access to 1,2-Unsymmetrical Diols

Published on: April 4, 2014

13.1K

Videos de Experimentos Relacionados

Last Updated: Aug 26, 2025

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides CHIPS
06:34

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides CHIPS

Published on: June 20, 2014

13.9K
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
Retropinacol/Cross-pinacol Coupling Reactions - A Catalytic Access to 1,2-Unsymmetrical Diols
10:12

Retropinacol/Cross-pinacol Coupling Reactions - A Catalytic Access to 1,2-Unsymmetrical Diols

Published on: April 4, 2014

13.1K

Área de la Ciencia:

  • Química sustentable
  • Fotocatálisis
  • Energía verde

Sus antecedentes:

  • Los radicales intermedios en la fotocatálisis son altamente reactivos, lo que lleva a reacciones secundarias.
  • La producción sostenible de productos químicos e hidrógeno requiere el control de estos intermedios reactivos.

Objetivo del estudio:

  • Investigar el papel del enlace de hidrógeno en el control de los radicales intermedios durante las reacciones fotocatalíticas.
  • Mejorar la selectividad y la eficiencia de la formación de enlaces carbono-carbono mediante fotocatálisis.

Principales métodos:

  • Se utilizó un fotocatalizador de oro sobre sulfuro de cadmio (Au/CdS) para el deshidroacoplamiento del etanol.
  • Se introduce agua para facilitar la unión de hidrógeno en la superficie del catalizador y en la solución.
  • Analizó los efectos del enlace de hidrógeno en el comportamiento del radical α-hidroxietil (αHR).

Principales resultados:

  • El enlace de hidrógeno inhibió la oxidación y las reacciones inversas de los αHR.
  • La adición de agua aumentó la tasa de acoplamiento de αHR en 2,4 veces.
  • La selectividad para el 2,3-butanodiol (BDO) aumentó del 37% al 57%.

Conclusiones:

  • Las interacciones no covalentes, como el enlace de hidrógeno, pueden dirigir las vías de reacción radical.
  • El enlace de hidrógeno ofrece una estrategia para la fotocatálisis selectiva y la síntesis química sostenible.
  • Este enfoque mejora la producción de productos químicos valiosos y energía de hidrógeno.