Synthesis of M2Rh2 Bis(μ3-carbon dioxide) Complexes from the Reaction between [Rh(OH)(η4-COD)]2 and Cationic Metal Carbonyls
| Autor: | Stephen M. Tetrick, John R. Pinkes, Chongfu Xu, Alan R. Cutler |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
chemistry.chemical_classification
Base (chemistry) Diene Stereochemistry Norbornadiene Organic Chemistry Cationic polymerization Metal carbonyl Crystal structure Medicinal chemistry Inorganic Chemistry chemistry.chemical_compound chemistry Carbon dioxide Carboxylate Physical and Theoretical Chemistry |
| Zdroj: | Organometallics. 17:1861-1867 |
| ISSN: | 1520-6041 0276-7333 |
| DOI: | 10.1021/om970443k |
| Popis: | The M2Rh2 bis(μ3-CO2) complexes [Cp*(CO)(NO)Re(CO2)Rh(η4-cod)]2 (1) and [Cp*(CO)2MCO2Rh(η4-cod)]2, M = Fe (2) and Ru (3), were synthesized in moderate to high yields from treating [Rh(OH)(η4-cod)]2 (cod = 1,5-cyclooctadiene) with the carbonyl salts Cp*(L)(CO)2M+ (L = CO, M = Fe, Ru; L = NO, M = Re) and a base. [An alternative synthesis of 1 and its crystallographic structure determination has been reported.] Although details on using several bases in the synthesis of 2 are reported, the use of volatile EtMe2N in excess as the base is especially useful. IR and NMR spectral data are in accord with a M2Rh2 bis(μ3-CO2) core for 2 and 3: they retain two μ3-[η1-C(M):η1-O(Rh):η1-O‘(Rh‘)] carboxylate ligands that resemble those that were found for 1 and the Rh(I) carboxylates [(RCO2)Rh(diene)]2. Complexes 2 and 3 with their “open-book” structures are not fluxional at room temperature. Complex 2, its norbornadiene analogue, [Cp*(CO)2FeCO2Rh(η4-nbd)]2 (4), and their 13C-labeled derivatives also are accessible from... |
| Databáze: | OpenAIRE |
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