Coordination chemistry of the activation of [(triazacyclohexane)CrCl3] with [PhNMe2H][B(C6F5)4] and AlR3
| Autor: | Shahram Mihan, Gabriele Kociok-Köhn, Randolf D. Köhn, Mary F. Mahon, David Smith, Martina Prinz |
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| Rok vydání: | 2003 |
| Předmět: |
chemistry.chemical_classification
Chemistry Stereochemistry Organic Chemistry chemistry.chemical_element Biochemistry Medicinal chemistry Toluene Coordination complex Catalysis Adduct Inorganic Chemistry chemistry.chemical_compound Chromium Oxidation state Materials Chemistry Physical and Theoretical Chemistry Solubility Aluminoxane |
| Zdroj: | Journal of Organometallic Chemistry. 683:200-208 |
| ISSN: | 0022-328X |
| Popis: | Complexes of N-substituted 1,3,5-triazacyclohexanes with CrCl3 form 1:1 adducts with [PhNMe2H][B(C6F5)4] with increased solubility in toluene. Addition of AliBu3 leads to free PhNMe2 and a complex with [B(C6F5)4]− weakly coordinated to chromium via a meta-fluorine atom. This complex can polymerise and/or trimerise olefins similar to methyl aluminoxane activated complexes. Decomposition of the active complex involves transfer of the triazacyclohexane to aluminium leading to [(triazacyclohexane)AliBu2][B(C6F5)4] and [(arene)2Cr][B(C6F5)4]. These chromium(I) complexes have been characterised by X-ray crystallography and prove that chromium is reduced to the oxidation state +I during the catalysis. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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