119694-78-9Relevant academic research and scientific papers
Iridium-catalyzed formation of trans-polyphenylacetylene by alkyne polymerization
Marigo, Mauro,Millos, Dunja,Marsich, Nazario,Farnetti, Erica
, p. 319 - 329 (2008/10/08)
The iridium(I) compounds HIr(cod)(PR3)2 (cod: 1,5-cyclooctadiene; PR3: Ph3, P(p-MeOC6H 4)3, P(o-MeOC6H4)Ph2, PCyPh2, PCy2Ph
Reactivity studies of tricyclohexylphosphine (PCy3) square-planar iridium complexes with small gaseous molecules (O2, H2, Cl2, and SO2). Molecular and crystal structure of Ir(CO)[OS(O)OH](SO2)(PCy3)2·C 6H6, the first structurally characterized ...
Miller, Cynthia A.,Lake, Charles H.,Churchill, Melvyn Rowen,Atwood, Jim D.
, p. 5442 - 5445 (2008/10/09)
Full title: Reactivity studies of tricyclohexylphosphine (PCy3) square-planar iridium complexes with small gaseous molecules (O2, H2, Cl2, and SO2). Molecular and crystal structure of Ir(CO)[OS(O)OH](SO2)(PCy3)2·C 6H6, the first structurally characterized oxygen-coordinated SO3H complex formed by insertion of SO2(g) into an M-OH bond. Square-planar iridium complexes of the large but strongly donating PCy3 (Cy = cyclohexyl) ligand, trans-Ir(CO)(Cl)(PCy3)2 and trans-Ir(CO)(OH)(PCy3)2, have been reacted with the molecules O2, H2, Cl2, and SO2. In comparison to the analogous PPh3 complexes, the presence of PCy3 inhibits reactions with H2 and O2 but has little effect on reactions with Cl2 and SO2. In the latter two reactions the greater electron density compensates for the larger size of the PCy3 ligands. Reaction of SO2 with trans-Ir(CO)(OH)(PCy3)2 leads to an oxygen-coordinated hydrogen sulfite ligand, and the structure was determined. The molecules exist in the crystals as weakly bound dimers.
Synthesis and reactivity of alkoxy(η4-cycloocta-1,5-diene)iridium(I) and -rhodium(I) M(OR)(cod)(PCy3) Compounds. X-ray crystal structure of the alkynyl Ir(C≡CPh)(cod)(PCy3) complex
Fernández, María J.,Esteruelas, Miguel A.,Covarrubias, Macarena,Oro, Luis A.,Apreda, María-Carmen,Foces-Foces, Concepción,Cano, Felix H.
, p. 1158 - 1162 (2008/10/08)
The synthesis and reactivity of the alkoxy(η4-cycloocta-1,5-diene)iridium(I) Ir(OR)(cod)(PCy3) (R = Me, Et, or Ph; Cy = cyclohexyl; cod = cycloocta-1,5-diene) complexes are described. They are prepared by reaction of [Ir(μ-OR)(cod)]2 with PCy3. The synthesis of Rh(OPh)(cod)(PCy3) by reaction of [Rh(μ-OMe)(cod)]2 with PCy3 and PhOH is also reported. Treatment of [Ir(μ-OMe)(cod)]2 with PCy3 in methanol for 24 h gives a mixture of the hydrido IrH5(PCy3)2 and mer-IrH3(CO)(PCy3)2 complexes. Ir(OEt)(cod)(PCy3) reacts with HSiR3 (SiR3 = SiEt3 or SiMe2Ph) leading to the formation of IrH2(SiR3)(cod)(PCy3). Ir(OR)(COd)(PCy3) undergoes alkoxy exchange with phenol. Alkoxy exchange is also observed in the reaction of Ir(OEt)(COd)(PCy3) with phenylacetylene (HC≡CPh); the resulting Ir(C≡CPh)(cod)(PCy3) complex has been characterized by X-ray diffraction. Ir(C≡CPh)(cod)(PCy3): triclinic, space group P1, Z = 2, a = 12.3726 (6) A?, b = 11.1529 (4) A?, c = 12.4738 (5) A?, α = 105.307 (4)°, β = 101.845 (3)°, and γ = 107.607 (4)°. The structure was solved by Patterson and difference direct methods and refined to a conventional agreement factor of 0.034. The coordination around iridium is slightly distorted square planar, with a Ir-C(1) distance of 1.998 (6) A? and a C(1)-C(2) (C≡C) bond length and C(1)-C(2)-C(3) angle of 1.200 (10) A? and 176.5 (8)°, respectively.
