Dicationic alkylidene, olefin and alkoxyalkenylcarbene, osmium complexes stabilized by a NHC Ligand

Buil, M. L. (Universidad de Zaragoza) ; Castarlenas, R. ; Esteruelas, M. A. (Universidad de Zaragoza) ; Izquierdo, S. ; Lalrempuia, R. ; Oñate, E.

Resumen: Complex [Os(═CHPh)(CH3CN)4(IPr)](OTf)2 (1) (IPr = 1,3-bis(2,6-diisopropylphenyl)imidazolylidene; OTf = CF3SO3) exchanges the alkylidene group with propylene to give styrene and [Os(═CHCH3)(CH3CN)4(IPr)](OTf)2 (2). The reaction of 1 with ethylene leads to [Os(η2-CH2═CH2)(CH3CN)4(IPr)](OTf)2 (3) via the propylene intermediate [Os(η2-CH2═CHCH3)(CH3CN)4(IPr)](OTf)2 (4). Acetonitrile displaces the olefin ligand of both 3 and 4 to generate the pentakis(solvento) derivative [Os(CH3CN)5(IPr)](OTf)2 (5). In 2-propanol and methanol, complex 5 reacts with 1,1-diphenyl-2-propyn-1-ol and 2-methyl-3-butyn-2-ol to yield the corresponding alkoxyalkenylcarbene compounds [Os{═C(OR)CH═CR′2}(CH3CN)4(IPr)](OTf)2 (R = CH(CH3)2; R′ = Ph (6), CH3 (7); R = CH3; R′ = Ph (8), CH3 (9)). The X-ray structures of 4, 5, and 6 are also reported.

Idioma: Inglés

DOI: 10.1021/om900949j

Año: 2010

Publicado en: Organometallics 29, 4 (2010), 876-882
ISSN: 0276-7333

Factor impacto JCR: 3.888 (2010)

Categ. JCR: CHEMISTRY, ORGANIC rank: 10 / 56 = 0.179 (2010) - Q1 - T1
Categ. JCR: CHEMISTRY, INORGANIC & NUCLEAR rank: 6 / 43 = 0.14 (2010) - Q1 - T1

Financiación: info:eu-repo/grantAgreement/ES/DGA/E35
Financiación: info:eu-repo/grantAgreement/ES/MICINN/CSD2007-00006
Financiación: info:eu-repo/grantAgreement/ES/MICINN/CTQ2008-00810

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Química Inorgánica (Dpto. Química Inorgánica)