Preparation and Structure of Alkylidene-Osmium and Hydride-Alkylidyne-Osmium Complexes Containing an N-Heterocyclic Carbene Ligand
Autores: Ricardo Castarlenas, Miguel A. Esteruelas y Enrique Oñate
Ref. revista: Organometallics, 26, 2129-2132, (2007)
The complex [(è6-p-cymene)OsCl(dCHPh)(IPr)]OTf (1) releases the arene in acetonitrile at 40 °C. The resulting
12-Valence-electron metallic fragment is trapped by the solVent to afford the tris(solVento) compound [OsCl(dCHPh)(NCCH3)3(IPr)]OTf (2), which reacts with AgOTf in acetonitrile at room temperature to giVe the tetrakis(solVento) deriVatiVe [Os(dCHPh)(NCCH3)4(IPr)](OTf)2 (3). In dichloromethane at 40 °C, the treatment of 1 with triisopropylphosphine and triphenylphosphine yields the unsaturated fiVe-coordinate mixed phosphine-NHC hydride-alkylidyne-osmium species [OsHCl- (tCPh)(IPr)(PR3)]OTf (R ) iPr (4), Ph (5)).
The complex [(è6-p-cymene)OsCl(dCHPh)(IPr)]OTf (1) releases the arene in acetonitrile at 40 °C. The resulting
12-Valence-electron metallic fragment is trapped by the solVent to afford the tris(solVento) compound [OsCl(dCHPh)(NCCH3)3(IPr)]OTf (2), which reacts with AgOTf in acetonitrile at room temperature to giVe the tetrakis(solVento) deriVatiVe [Os(dCHPh)(NCCH3)4(IPr)](OTf)2 (3). In dichloromethane at 40 °C, the treatment of 1 with triisopropylphosphine and triphenylphosphine yields the unsaturated fiVe-coordinate mixed phosphine-NHC hydride-alkylidyne-osmium species [OsHCl- (tCPh)(IPr)(PR3)]OTf (R ) iPr (4), Ph (5)).