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Un 1,2-disilaciclohexeno estable y su complejo de 14 electrones de paladio (((0))

Takashi Abe¹, Takeaki Iwamoto, Mitsuo Kira

¹Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan.

Journal of the American Chemical Society

|March 23, 2010

Resumen

Los investigadores sintetizaron un nuevo disileno cíclico estable y un complejo de paladio. Este complejo de disileno paladio exhibe el carácter más fuerte del complejo pi reportado hasta la fecha, avanzando en la química del organosilicio.

Área de la Ciencia:

Química del organosilicio Química del organosilicio
Coordinación Química de la Coordinación

Sus antecedentes:

Los disilenos cíclicos son análogos de silicio de los carbenos cíclicos, que ofrecen una reactividad única.
Los disilenos estables son difíciles de sintetizar debido a la alta reactividad del silicio.

Objetivo del estudio:

Para sintetizar un nuevo disileno cíclico estable con pequeños sustitutos residuales.
Para sintetizar y caracterizar un complejo de disileno palladio y evaluar sus propiedades electrónicas.

Principales métodos:

Síntesis de 1,2-difenil-3,3,6,6-tetrácis ((trimethylsilyl) -1,2-disilaciclohexeno a través de la reacción del 1,4-dilithiobutano con el fenilclorosilano.
Formación de un complejo de disileno paladio en forma de Y a través de la reacción con bis ((triciclohexilfosfina) paladio.

Principales resultados:

Se sintetizó con éxito un nuevo disileno cíclico estable, 1.
Se formó un complejo de disileno-paladio en forma de Y tricoordinado y estable, 2.
El complejo 2 mostró el carácter más fuerte del complejo pi entre los complejos conocidos de disileno y paladio.

Conclusiones:

La estrategia sintética desarrollada es aplicable para crear disilenos cíclicos estables con pequeños sustituyentes.
El complejo de disileno-paladio sintetizado representa un avance significativo en la comprensión de la unión metal-disileno.

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