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Updated: Aug 15, 2025
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Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
Published on: March 20, 2017
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Síntesis y caracterización de un complejo de nitruro de cerio puente
Henry H Wilson1, Xiaojuan Yu2, Thibault Cheisson1
1P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States.
Journal of the American Chemical Society
|January 5, 2023
Resumen
Los investigadores reportan el primer complejo molecular de nitruro de cerio, [TriNOx) Ce Li2μ-N) CeTriNOx) BArF4 . Este descubrimiento avanza en la comprensión de los enlaces múltiples lantánidos-ligandos raros y los enlaces 4f/5d.
Área de la Ciencia:
- Química inorgánica
- Química organometálica
- Química de los lantánidos
Sus antecedentes:
- Los enlaces múltiples Lanthanide-ligand son raros y reactivos, lo que plantea desafíos para la síntesis y la caracterización.
- La comprensión del enlace 4f/5d en los lantánidos es crucial para la comparación con los elementos de bloque d y los actinuros.
- Los complejos moleculares de metal-nitruro son objetivos sintéticamente valiosos.
Objetivo del estudio:
- Para sintetizar y caracterizar el primer complejo molecular de nitruro de cerio.
- Investigar la naturaleza del enlace en enlaces múltiples de cerio y nitrógeno.
- Para comparar el enlace lantánido 4f/5d con otros elementos.
Principales métodos:
- Desprotonación de un complejo monometálico de cerio y amoníaco.
- Aislamiento y caracterización mediante cristalografía de rayos X.
- Espectroscopia vibratoria (IR) y espectroscopia de rayos X.
- Los análisis computacionales (DFT).
Principales resultados:
- Aislamiento y caracterización de un complejo puente de cerio ((IV) nitruro: [ ((TriNOx) Ce ((Li2μ-N) Ce ((TriNOx)) ] [BArF4].
- Determinación de la longitud media del enlace CeN como 2,117 ((3) Å.
- La evidencia espectroscópica confirmó el estado de oxidación +4 del cerio y la participación de la cáscara 4f en la unión.
Conclusiones:
- El primer complejo molecular de nitruro de cerio ha sido sintetizado y caracterizado con éxito.
- El estudio proporciona información sobre la estructura electrónica y el enlace de los enlaces múltiples lantánido-nitrógeno.
- Este trabajo abre vías para explorar otros complejos lantánidos raros con enlaces múltiples.
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