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Formación y reactividad del complejo Os(IV) -azidoimido, PPN[Os(IV)

My Hang V Huynh¹, R Thomas Baker, Donald L Jameson

¹Chemistry Division, MS J514, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. huynh@lanl.gov

Journal of the American Chemical Society

|April 25, 2002

Resumen

Este estudio informa de la síntesis de nuevos complejos Os(IV) -azidoimido a partir de precursores de Os(VI) -nitrido. Estos complejos se someten a hidroxilación y desprotonación para producir especies sin precedentes de óxido de Os (II) -dinitrógeno.

Área de la Ciencia:

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

Sus antecedentes:

Los complejos de nitrido de osmio son valiosos precursores en la síntesis inorgánica.
La reactividad de los complejos de osmio de alta valencia con ligandos a base de nitrógeno está poco explorada.

Objetivo del estudio:

Para sintetizar y caracterizar nuevos complejos de osmio-azidoimido.
Investigar la reactividad posterior de estos nuevos complejos, incluida la hidroxilación y la eliminación del nitrógeno.

Principales métodos:

Reacción de los complejos de Os(VI) -nitrido con el bis-(trifenilfosforanilideno) azido de amonio.
Caracterización espectroscópica que incluye el etiquetado 15N, IR y 15N NMR.
Transformaciones químicas que incluyen hidroxilación y desprotonación.

Principales resultados:

Síntesis de complejos de Os(IV) -azidoimido, [OsIV(L2)(Cl)3(NN3)]-, para varios ligandos de la bipiridina y la fenantrolina.
Confirmación de la estructura del ligando N42- utilizando el etiquetado isotópico y RMN.
Formación de un complejo Os(IV) -azidohidroxoamido y posterior generación de un complejo Os(II) -dinitrogenóxido, [OsII(bpy) ((Cl) 3 ((N2O) ]-.

Conclusiones:

El estudio presenta los primeros ejemplos bien caracterizados de Os(IV) - azidoimido y Os(II) - complejos de óxido de nitrógeno.
Demuestra una nueva ruta sintética para los compuestos de osmio-nitrógeno.
Destaca la versátil reactividad de los complejos de nitrido de osmio.

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