8-Oxyquinolate iridium(I) complexes and their oxidative-addition reactions |
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Authors: | Rafael Usón Luis A. Oro Miguel A. Ciriano Rafael Gonzalez |
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Affiliation: | Department of Inorganic Chemistry, University of Zaragoza, Zaragoza Spain |
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Abstract: | The novel sixteen-electron complex [Ir(Oq)(COD)] (Oq = 8-oxyquinolate; COD = 1,5-cyclooctadiene) adds monodentate phosphines, phosphites or activated olefins irreversibly to give pentacoordinate iridium(I) complexes of the type [Ir(Oq)(COD)L] (L = PPh3, P(OPh)3, maleic anhydride or tetracyano-ethylene). Reaction of [Ir(Oq)(COD)] with some diphosphines leads to substitution products of the general formula [Ir(Oq)(diphos)] (diphos = 1,2-bis(diphenylphosphino)ethane or cis-1,2-bis(diphenylphosphino)ethylene). Carbon monoxide displaces the COD group from the complexes giving either [Ir(Oq)(CO)2] or [Ir(Oq)(CO)L], and the latter undergo oxidative addition reactions with SnCl4, Me3SiCl, Me3SnCl, MeI, allylbromide, PhCOCl, MeCOCl, Cl2, Br2, TlCl3 and HCl leading to novel iridium(III) complexes. |
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