Video Experimental Relacionado
Updated: Jul 8, 2026
14:51
An Available Technique for Preparation of New Cast MnCuNiFeZnAl Alloy with Superior Damping Capacity and High Service Temperature
Published on: September 23, 2018
Ajuste de las propiedades en el núcleo heterobimetálico: ligandos mixtos bismuto rodio carboxilatos de rueda de remo
Evgeny V Dikarev1, Bo Li, Haitao Zhang
1Department of Chemistry, University at Albany, Albany, NY 12222, USA. dikarev@albany.edu
Journal of the American Chemical Society
|March 2, 2006
Resumen
Se sintetizaron nuevos compuestos heterometálicos de ligandos mixtos utilizando una reacción en fase gaseosa. Este método sintoniza eficazmente las propiedades e introduce ligandos quirales en núcleos heterobimetálicos.
Área de la Ciencia:
- Química Inorgánica La Química Inorgánica es la química inorgánica.
- Química organometálica Química orgánica de los metales.
Sus antecedentes:
- Los compuestos heterobimetálicos que contienen bismuto y rodio ofrecen propiedades químicas únicas.
- El control de los entornos de ligandos en estos complejos es crucial para afinar su funcionalidad.
Objetivo del estudio:
- Para sintetizar nuevos compuestos heterometálicos de ligando mixto y ligando de bismuto y rodio.
- Explorar un método de reacción en fase gaseosa para crear estos compuestos.
- Para investigar la introducción de ligandos quirales en un núcleo heterobimetálico.
Principales métodos:
- Reacciones en fase gaseosa entre el bismuto (II) trifluoroacetato y el rodio (II) carboxilatos.
- Síntesis de compuestos de ligandos mixtos con diferentes ligandos de trifluoroacetato y carboxilato.
- Caracterización de los complejos heterobimetálicos resultantes.
Principales resultados:
- Se han sintetizado con éxito compuestos heterometálicos de ligandos mixtos [BiRh(O2CCF3) 4-x(O2CR) x].
- Demostró la efectividad de las reacciones en fase gaseosa para esta síntesis.
- Se logra el ajuste de las propiedades de los compuestos a través de la variación del ligando.
- Se han introducido con éxito ligandos quirales en el núcleo heterobimetálico.
Conclusiones:
- Las reacciones en fase gaseosa proporcionan una ruta efectiva para la síntesis de compuestos sintonizables de ligando mixto y ligando heterobimetálico bismuto-rodio sintonizables.
- Este enfoque facilita la incorporación de ligandos quirales, abriendo posibilidades para nuevas aplicaciones.
Videos de Conceptos Relacionados
03:06Alkali Metals
Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
Table 1: Properties of the alkali metals
02:34Structural Isomerism
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 be...
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 be...
02:42Valence Bond Theory
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
01:19Complexation Equilibria: The Chelate Effect
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
01:09Colloidal precipitates
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
01:09Complexation Equilibria: Factors Influencing Stability of Complexes
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...