Thermal and Transition-Metal-Catalyzed Ring-Opening Polymerization (ROP) of [1]Silaferrocenophanes with Chlorine Substituents at Silicon: A Route to Tunable Poly(ferrocenylsilanes)
| Autor: | Daniel A. Foucher, John K. Pudelski, and Alan J. Lough, David L. Zechel, Yizeng Ni, Ron Rulkens, Kai C. Hultzsch, David Balaishis, Ian Manners |
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| Rok vydání: | 1996 |
| Předmět: |
chemistry.chemical_classification
Silanes Chemistry Organic Chemistry Tetramethylethylenediamine Polymer Photochemistry Ring-opening polymerization Inorganic Chemistry chemistry.chemical_compound Polymerization Cyclopentadienyl complex Transition metal Halogen Polymer chemistry Physical and Theoretical Chemistry |
| Zdroj: | Organometallics. 15:1972-1978 |
| ISSN: | 1520-6041 0276-7333 |
| Popis: | The silicon-bridged [1]ferrocenophanes Fe(η-C5H4)2SiRR‘ [3 (R = Me, R‘ = Cl), 4 (R = R‘ = Cl)] with chlorine substituent(s) at silicon were prepared via the reaction of Fe(η-C5H4Li)2·TMEDA (TMEDA = tetramethylethylenediamine) with the chlorinated silanes MeSiCl3 and SiCl4, respectively. An X-ray diffraction study of 4 indicated that the cyclopentadienyl rings in this species are tilted by an angle of 19.2(4)°, typical of other structurally characterized silicon-bridged [1]ferrocenophanes. Thermal ring-opening polymerization (ROP) of 3 and 4 at 250 °C yielded the first high molecular weight poly(ferrocenylsilanes) with halogen substituents at silicon, [Fe(η-C5H4)2SiRR‘]n [7 (R = Me, R‘ = Cl), 8 (R = R‘ = Cl)]. Transition-metal-catalyzed polymerization of 3 and 4 with Pd and Pt catalysts also yielded polymers 7 and 8 in solution at room temperature. Polymer 7 was soluble in polar organic solvents and was characterized by 1H, 29Si, and 13C NMR and elemental analysis. In contrast, poly(ferrocenylsilane) 8 was... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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