Synthese und reaktivität des diphenylacetyleniridium-komplexes C5H5Ir(C2Ph2)PPr3i und bildung einer isomeren iridainden-verbindung |
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Authors: | H Werner A Höhn |
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Institution: | Institut für Anorganische Chemie der Universität Würzburg, Am Hubland, D-8700 Würzburg B.R.D. |
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Abstract: | trans-IrCl(C2R2)(PPr3i)2] complexes are prepared from (C8H14)2IrCl]2, PPr3i and C2R2 (R = H, Me, Ph) via the intermediate IrCl(PPr3i)2]. With phenylacetylene, a mixture of two isomers, trans-IrCl(PhC2H)(PPr3i)2] and IrHCl(C2Ph)(PPr3i)2 is formed which reacts with pyridine to give IrHCl(C2Ph)(py)(PP3i)2. Reaction of trans-IrCl(C2Ph2)(PPr3i)2] with NaC5H5 yields the compound C5H5Ir(C2Ph2)PPr3i (VI) which is transformed via the vinyl complex C5H5Ir(CPhCHPh)(OCOCF3)PPr3i (VII) into the iridaindene derivative IX. Using VII as the starting material, C5H5Ir(OCOCF3)2PPr3i, C5H5Ir(CPhCHPh)(I)PPr3i and C5H5Ir(CPhCHPh)(CH3)PPr3i are also obtained. Treatment of VI with Br2 and I2 respectively yields the complexes C5H5IrX2PPr3i) (XII, X = Br; XIII, X = I), of which XIII reacts with CH3MgI to give C5H5Ir(CH3)2PPr3i. |
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