Cationic iridium diolefin complexes as alkene hydrogenation catalysts and the isolation of some related hydrido complexes
作者： Robert H. Crabtree , Hugh Felkin , George E. Morris
DOI: 10.1016/S0022-328X(00)92273-3
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摘要: Abstract In non-coordinating solvents, such as CH 2 Cl , the complexes [Ir(cod)L ]PF 6 (I) and [Ir(cod)L(py)]PF (II) (cod 1,5-cyclooctadiene; py pyridine, L tertiary phosphine) are very active homogeneous hydrogenation catalysts for alkenes. When alkene has been consumed, or, in certain cases, only partially catalyst is irreversibly deactivated; metal-containing product from I [Ir2(μ-H) 3 H (III). With HCI, III gives [Ir (μ-Cl) (μ-H)H 4 . The catayst system isolable [IrH 5 ) with NEt while that II these presence of an excess L.
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