Synthesis,Characterization and Reactivity of the Tricarbonyl(formylcycloheptatrienyl)iron‐Anion [(η3‐C7H6CHO)Fe(CO)3]− |
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| Authors: | Wenyi Fu Frank Edelmann Prof. Dr. Josef Takats Prof. Dr. |
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| Affiliation: | 1. Edmonton / Canada, Department of Chemistry of the University of Alberta;2. Current address: NAEFA Pharmaceutical Research and Development, Edmonton, Alberta T6E 5V2 / Canada;3. Universit?tsplatz 2, D‐39106 Magdeburg / Germany, Fax: +49 391 6712933;4. Frank Edelmann, Universit?tsplatz 2, D‐39106 Magdeburg / Germany, Fax: +49 391 6712933;5. Josef Takats, University of Alberta, Department of Chemistry, Edmonton, Alberta T6G 2G2 / Canada, Fax: +780‐492‐8231 |
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| Abstract: | Deprotonation of the readily available organometallic aldehyde derivative [(η4‐C7H7CHO)Fe(CO)3] ( 2 ) with NaN(SiMe3)2 in benzene solution at ambient temperature afforded the anionic formylcycloheptatrienyl complex Na[(η3‐C7H6CHO)Fe(CO)3] ( 3 ). The anion is fluxional in solution and displays a unique ambident reactivity towards electrophiles (MeI, Me3SiCl). New substituted [(η4‐RC7H6CHO)Fe(CO)3] and [(η4‐heptafulvene)Fe(CO)3] complexes have been identified as the products. Treatment of 3 with 0.5 equivalents of dimeric [(COD)RhCl]2 (COD = 1,5‐cyclooctadiene) afforded the functionalized Fe‐Rh cycloheptatrienyl complex [(μ‐C7H6CHO)(CO)3FeRh(COD)] ( 7 ) in up to 86 % yield. Carbonylation of 7 under an atmosphere of CO led to facile conversion to the heterobimetallic pentacarbonyl derivative [(μ‐C7H6CHO)(CO)3FeRh(CO)2] ( 8 ), which is also accessible in lower yield from the direct reaction of 3 with [Rh(CO)2Cl]2. |
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| Keywords: | Cycloheptatrienyl complexes Formylcycloheptatrienyl ligand Iron tricarbonyl complexes Rhodium complexes Fluxional behavior X‐ray structure |
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