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Un complejo dinuclear sin precedentes de alquilrodio (III) compuesto por dos unidades de 14 electrones [RhCl2

Giuseppe Canepa¹, Carsten D Brandt, Helmut Werner

¹Institut für Anorganische Chemie der Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany.

Journal of the American Chemical Society

|August 15, 2002

Resumen

Los investigadores sintetizaron un nuevo complejo de alquilrodio (III) y un complejo único de dicarbonilo de rodio. Este trabajo amplía el conocimiento de la química organometálica y la catálisis del rodio.

Área de la Ciencia:

Química organometálica Química orgánica de los metales.
Química Inorgánica La Química Inorgánica es la química inorgánica.
La catálisis es la catálisis.

Sus antecedentes:

Los complejos organometálicos que contienen rodio son vitales en varios procesos catalíticos.
La síntesis y caracterización de nuevos complejos de rodio contribuyen a la comprensión de los mecanismos de reacción y el desarrollo de nuevos catalizadores.
Los complejos de alquilrodio, en particular, son importantes intermediarios en muchas transformaciones catalíticas.

Objetivo del estudio:

Para sintetizar y caracterizar un nuevo complejo dinuclear de alquilrodio (III) complejo.
Para preparar y caracterizar completamente el ligando de triquilfosfina hasta ahora desconocido, tBu2PCH2CH2C6H3-2,6-Me2 (PR3).
Para investigar la reacción del complejo de rodio sintetizado con el monóxido de carbono (CO) para formar un complejo de dicarbonilo de rodio mononuclear.

Principales métodos:

La síntesis implicó la reacción de HCl con un precursor dinuclear de rodio.
Se empleó un análisis cristalográfico para determinar la estructura del complejo dinuclear de alquilrodio (III) resultante.
Se utilizaron métodos espectroscópicos para caracterizar el complejo dicarbonilo de rodio mononuclear final.

Principales resultados:

Se sintetizó con éxito y se caracterizó estructuralmente un nuevo complejo dinuclear de alquilrodio (III), [RhCl2 (C2H5) (PR3) ]2 .
El ligando de triquilfosfina previamente desconocido, tBu2PCH2CH2C6H3-2,6-Me2 (PR3), fue preparado en tres pasos.
El tratamiento del complejo dinuclear con CO produjo el dicarbonilo mononuclear de rodio cis-[RhCl ((CO) 2 ((PR3) ], el primer complejo completamente caracterizado de su tipo.

Conclusiones:

El estudio sintetizó y caracterizó con éxito nuevos complejos de alquilrodio (III) y dicarbonilo de rodio.
El desarrollo del nuevo ligando de trialquilfosfina amplía el conjunto de herramientas para la síntesis organometálica.
Esta investigación proporciona información valiosa sobre la reactividad del complejo de rodio y sienta las bases para posibles aplicaciones catalíticas.

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