Phospido-bridged mixed metal complexes. Reaction of (CO)4Ru(μ-PPh2)Co(CO)3 with bis(diphenylphosphino)methane (dppm): Synthesis and crystal structures of heterobimetallic (RuCo) compounds with chelating and bridging dppm ligands
| Autor: | Arthur J. Carty, Salaheddine Guesmi, Pierre H. Dixneuf, Nicolas J. Taylor |
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| Rok vydání: | 1987 |
| Předmět: |
Denticity
Mixed metal Stereochemistry Chemistry Organic Chemistry Crystal structure Nuclear magnetic resonance spectroscopy Biochemistry Medicinal chemistry Methane Inorganic Chemistry chemistry.chemical_compound Intramolecular force X-ray crystallography Materials Chemistry Chelation Physical and Theoretical Chemistry |
| Zdroj: | Journal of Organometallic Chemistry. 328:193-207 |
| ISSN: | 0022-328X |
| Popis: | The reaction of (OC)4Ru(μ-PPh2Co(CO)3 (1) with Ph2PCH2PPh2 (dppm) in THF gave the dppm chelate complex (dppm)(CO)2Ru(μ-PPh2)Co(CO)3 (3) at 40°C but the dppm-bridged complex (OC)3Ru(μ-dppm)(μ-PPh2)Co(CO)2 (4) at reflux. Treatment of 1 with Me3NO at −55°C in the presence of dppm gave the dppm monodentate derivative (dppm)(OC)3Ru(μ-PPh2)Co(CO)3 (2) which contained two isomers with a relative cis or trans position of the dppm ligand with respect to the phosphido bridge. The structures of 2, 3 and 4 are based on a 31P NMR study and on X-ray diffraction studies of 3 and 4. It is shown that complexes 3 and 4 do not undergo interconversion, and are formed from 2 by competitive intramolecular carbonyl displacement reactions. |
| Databáze: | OpenAIRE |
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