Video Experimental Relacionado

Updated: Jun 25, 2025

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

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

Published on: November 9, 2019

Stannylone estabilizado con bisgermileno: reducción catalítica de óxido nitroso y compuestos nitros mediante la

Binglin Lei¹, Fanshu Cao¹, Ming Chen¹

¹State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, China.

Journal of the American Chemical Society

|May 23, 2024

Resumen

Un nuevo compuesto de estaño cerovalente, la estanylona 2, cataliza eficazmente la desoxigenación del óxido nitroso y los nitroarenos. Este estanylón estabilizado con bis (germilenos) ofrece una nueva estrategia catalítica para estas importantes transformaciones químicas.

Área de la Ciencia:

Química organometálica
Catálisis
Química del grupo principal

Sus antecedentes:

Los compuestos del grupo principal de baja valencia son cada vez más reconocidos por su reactividad y potencial catalítico únicos.
El desarrollo de catalizadores eficientes para la desoxigenación de moléculas ambientalmente relevantes como el óxido nitroso y los nitroarenos es crucial.

Objetivo del estudio:

Síntesis y caracterización de un nuevo estanylón estabilizado con germileno.
Investigar su actividad catalítica en la reducción de óxido nitroso y nitroarenos.
Para aclarar el mecanismo de estas transformaciones catalíticas.

Principales métodos:

Síntesis de estanylona 2 mediante la reducción de un estanyleno digermilado utilizando grafito de potasio.
Caracterización estructural mediante métodos espectroscópicos y computacionales.
Estudios catalíticos que incluyen reacciones con óxido nitroso y nitroarenos.
Investigaciones mecánicas que incluyen reacciones estequiométricas y caracterización intermedia.

Principales resultados:

Síntesis exitosa de estanylone 2 estabilizado con bis (germilenos) con un rendimiento del 78%.
Los estudios computacionales revelaron un centro Sn(0) formal y un enlace π de 3-centro-2-electrón deslocalizado.
Stannylone 2 demostró una eficiente actividad precatalítica para la reducción de óxido nitroso a dinitrógeno y de nitroarenos a hidrazinas.
Aislamiento y caracterización de los productos intermedios clave (stanilenos 3 y 4) implicados en los ciclos catalíticos.

Conclusiones:

El efecto cooperativo de los centros de germanio y estaño de baja valencia en el estanylone 2 permite una escisión eficiente de los enlaces N-O.
Este estudio presenta una nueva estrategia para la desoxigenación catalítica de óxido nitroso y nitroarenos utilizando un compuesto de estaño cerovalente.
Los hallazgos abren nuevas vías para la utilización de compuestos del grupo principal de baja valencia en la catálisis.

Más Videos Relacionados

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

Videos de Conceptos Relacionados

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.

Preparation of Amines: Reduction of Oximes and Nitro Compounds

Preparation of Amines: Reduction of Oximes and Nitro Compounds

Oximes can be reduced to primary amines using catalytic hydrogenation, hydride reduction, or sodium metal reduction. The reduction of aliphatic and aromatic nitro compounds to primary amines takes place by either catalytic hydrogenation or by using active metals like Fe, Zn, and Sn in the presence of an acid.
Though catalytic hydrogenation can reduce nitrobenzenes, the reduction is nonselective in the presence of other functional groups. For instance, if nitrobenzene contains an aldehyde group,...

Catalysis

Catalysis

The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.

Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation

Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation

Unlike the easy catalytic hydrogenation of an alkene double bond, hydrogenation of a benzene double bond under similar reaction conditions does not take place easily. For example, in the reduction of stilbene, the benzene ring remains unaffected while the alkene bond gets reduced. Hydrogenation of an alkene double bond is exothermic and a favorable process. In contrast, to hydrogenate the first unsaturated bond of benzene, an energy input is needed; that is, the process is endothermic. This is...

Nitriles to Amines: LiAlH4 Reduction

Nitriles to Amines: LiAlH₄ Reduction

Nitriles are reduced to amines in the presence of strong reducing agents like lithium aluminum hydride through a typical nucleophilic acyl substitution. The reaction requires two equivalents of the reducing agent. The reducing agent acts as a source of hydride ions.
As shown below, the mechanism involves three steps. Firstly, the hydride ion acting as a nucleophile attacks the nitrile carbon to form an anion. In the second step, a second equivalent of the hydride ion attacks the anion to...