Hydroboration and hydrogenation of an osmium-carbon triple bond: Osmium chemistry of a bis-s-borane

The complex [OsHCl(¿CPh)(IPr)(PiPr3)]OTf (1; IPr = 1,3-bis(2,6-iisopropylphenyl)imidazolylidene, OTf =CF3SO3) replaces the chloride ligand with a hydroxo group to give [OsH(OH)(¿CPh)(IPr)(PiPr3)]OTf (2), which undergoes hydroboration and hydrogenation of its metal-carbon triple bond. The hydroborati...

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Detalles Bibliográficos
Autores: Buil, M.L., Cardo, J.J.F., Esteruelas, M.A., Fernández, I., Oñate, E.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2015
País:España
Institución:Universidad de Zaragoza
Repositorio:Zaguán. Repositorio Digital de la Universidad de Zaragoza
OAI Identifier:oai:zaguan.unizar.es:60632
Acceso en línea:http://zaguan.unizar.es/record/60632
Access Level:acceso abierto
Descripción
Sumario:The complex [OsHCl(¿CPh)(IPr)(PiPr3)]OTf (1; IPr = 1,3-bis(2,6-iisopropylphenyl)imidazolylidene, OTf =CF3SO3) replaces the chloride ligand with a hydroxo group to give [OsH(OH)(¿CPh)(IPr)(PiPr3)]OTf (2), which undergoes hydroboration and hydrogenation of its metal-carbon triple bond. The hydroboration products depend upon the reagent used. Treatment of 2 with Na[BH4] leads to the bis-s-borane complex OsH2(¿2:¿2-H2BCH2Ph)(IPr)(PiPr3) (3), whereas pinacolborane (HBPin) affords the arene compound [Os(¿6-C6H5CH2Bpin)H(IPr)(PiPr3)]OTf (4). The hydrogenation of the triple bond of 2 occurs under 4 atm of H2 and yields the toluene derivative [Os(¿6-C6H5CH3)H(IPr)(PiPr3)]OTf (5).

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