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Metalomimética del grupo principal: Sustitución fotolítica de CO similar al metal de transición en el boro

Holger Braunschweig^1,2, Ivo Krummenacher^1,2, Marc-André Légaré^1,2

¹Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany.

Journal of the American Chemical Society

|January 20, 2017

Resumen

Los investigadores sintetizaron un compuesto reactivo de borileno, [(CAAC) B ((CO) Ar], que actúa como un precursor de un borileno dicoordinado. Esto permite la creación de nuevas especies de borileno libres de metales y radicales que contienen boro.

Área de la Ciencia:

Química organometálica
Química del boro
Química de los carbenos

Sus antecedentes:

Los borilenos son especies altamente reactivas con una estabilidad limitada.
Las investigaciones anteriores se han centrado en los borilenos estabilizados por metales.

Objetivo del estudio:

Sintetizar y caracterizar un precursor estable de un borileno dicoordinado.
Para explorar la reactividad de los borilenos en transformaciones libres de metales.

Principales métodos:

Reacción de transferencia utilizando un complejo de borileno de hierro.
Extrusión fotolítica de monóxido de carbono para generar el borileno.
Reacciones de atrapamiento intermoleculares para estabilizar los intermedios reactivos.

Principales resultados:

Síntesis exitosa del adducto de monóxido de carbono de un arilborileno cíclico (alquilo) (amino) ligado al carbono, [(CAAC) B ((CO) Ar).
Liberación de un borileno dicoordinado, [(CAAC) ArB:], mediante fotólisis.
Generación de la primera especie de borileno libre de metales con un donante de nitrógeno y un nuevo radical que contiene boro a través de experimentos de captura.

Conclusiones:

El adducto de borileno sintetizado sirve como una fuente viable para generar borileno dicoordinado reactivo.
Este trabajo amplía el alcance de la química del borileno, permitiendo la formación de nuevos compuestos libres de metales y radicales.

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