Catalytic c−h activation of hydrocarbons by rhodium(I) and iridium(I) complexes with hemilabile quinolyl-cp ligands
The rhodium(I) and iridium(I) complexes 3a−6a contain the hemilabile Cp-quinoline chelate ligands 1 and 2, respectively, where the hard nitrogen donor does not displace the good acceptor ligand ethylene. After irradiation with visible light, intensely colored complexes are obtained, where the N-dono...
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| Main Authors: | , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2005
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| In: |
Organometallics
Year: 2005, Volume: 24, Issue: 20, Pages: 4774-4781 |
| ISSN: | 1520-6041 |
| DOI: | 10.1021/om050438d |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1021/om050438d
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| Author Notes: | Gerald Kohl, Ralph Rudolph, Hans Pritzkow, and Markus Enders |
| Summary: | The rhodium(I) and iridium(I) complexes 3a−6a contain the hemilabile Cp-quinoline chelate ligands 1 and 2, respectively, where the hard nitrogen donor does not displace the good acceptor ligand ethylene. After irradiation with visible light, intensely colored complexes are obtained, where the N-donor coordinates to the metal centers. Depending on the metal atom and on the substitution pattern at the Cp rings, the mono-ethene complex with N-metal coordination can be observed spectroscopically (e.g., 3b) or C−H addition products are probable intermediates. The iridium complex 6a is able to activate the aliphatic C−H bond in cyclohexane. With the rhodium complex 5a as the precatalyst, catalytic H/D exchange reactions have been performed with olefinic substrates. With linear α-olefins a fast double-bond isomerization dominates. The hemilabile ligands stabilize the catalytically active metal complexes without suppressing their activity significantly. |
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| Item Description: | Published online 20 August 2005 Gesehen am 18.11.2022 |
| Physical Description: | Online Resource |
| ISSN: | 1520-6041 |
| DOI: | 10.1021/om050438d |