Synthesis, Structure, Spectroscopy, and Reactivity of Thiapentadienyl-Cobalt-Phosphine Complexes
| Autor: | John R. Bleeke, Bryn L. Lutes, Nigam P. Rath |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
chemistry.chemical_classification
Double bond Stereochemistry Organic Chemistry chemistry.chemical_element Disproportionation Medicinal chemistry Inorganic Chemistry chemistry.chemical_compound chemistry Reactivity (chemistry) Lithium Physical and Theoretical Chemistry Cobalt Phosphine Cis–trans isomerism Carbon monoxide |
| Zdroj: | Organometallics. 28:4577-4583 |
| ISSN: | 1520-6041 0276-7333 |
| Popis: | The first examples of thiapentadienyl-cobalt complexes have been synthesized and structurally characterized. Treatment of (Cl)Co(PMe3)3 with potassium thiapentadienide yields a dimetallic product, 1, which is held together by two bridging thiapentadienyl ligands, one of which possesses a cis internal double bond and the other a trans internal double bond. Treatment of 1 with carbon monoxide breaks apart the cluster, producing a mixture of (5-η1-cis-5-thiapentadienyl)Co(PMe3)2(CO)2 (cis-2) and its trans isomer (trans-2). cis-2 can be made independently by reacting (Cl)Co(PMe3)2(CO)2 with potassium thiapentadienide. In contrast, treatment of (Cl)Co(PMe3)3 with lithium 2,3-dimethyl-5-thiapentadienide generates a trimetallic product, 3. This species is held together by four bridging thiapentadienyl ligands, all possessing trans internal double bonds. In compound 3, the central cobalt is a Co(II) center, produced through a disproportionation reaction, while the two terminal cobalts are Co(I) centers. Treatment... |
| Databáze: | OpenAIRE |
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