Synthesis and catalytic activity of rhenium carbonyl complexes containing alkyl-substituted tetramethylcyclopentadienyl ligands
| Autor: | Zhan-Wei Li, Su-Zhen Li, Xue-Zhong Zheng, Jin Lin, Zhi-Hong Ma, Zhangang Han |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Chemistry Metals and Alloys chemistry.chemical_element Metal carbonyl Rhenium Alkylation 010402 general chemistry 010403 inorganic & nuclear chemistry 01 natural sciences Medicinal chemistry 0104 chemical sciences Catalysis Inorganic Chemistry chemistry.chemical_compound Cyclopentadienyl complex Materials Chemistry Proton NMR Organic chemistry Organometallic chemistry Alkyl |
| Zdroj: | Transition Metal Chemistry. 42:137-144 |
| ISSN: | 1572-901X 0340-4285 |
| DOI: | 10.1007/s11243-016-0116-6 |
| Popis: | A series of six alkyl-substituted tetramethylcyclopentadienyl mononuclear metal carbonyl complexes [(η 5-C5Me4R)Re(CO)3] [R = allyl (1), i-Pr (2), n-butyl (3), t-butyl (4), benzyl (5), CH(CH2)4 (6)] have been synthesized by treating the corresponding ligands (C5Me4R) [R = allyl, i-Pr, n-butyl, t-butyl, benzyl, CH(CH2)4] with Re2(CO)10 in refluxing xylene. The six new complexes were characterized by elemental analysis, IR, 1H NMR and 13C NMR spectroscopy. The crystal structures of all six complexes were determined by X-ray crystal diffraction analysis, showing that they have similar molecular structures, being mononuclear carbonyl complexes. In each of these complexes, the Re atom is η 5 -coordinated to the cyclopentadienyl ring. Complexes 1–5 have significant catalytic activity in Friedel–Crafts reactions of aromatic compounds with alkylation reagents. Compared with traditional catalysts, these mononuclear rhenium carbonyl complexes have obvious advantages such as lower amounts of catalyst, mild reaction conditions and environmentally friendly chemistry. |
| Databáze: | OpenAIRE |
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