Cubic Group 13 Heterosiloxanes with Four Co3(CO)9C Cluster Units as Substituents: Novel Soluble Model Compounds for Synthetic Zeolites Showing Catalytic Activity in Hydroformylation Reactions
| Autor: | Uwe Ritter, Ramaswamy Murugavel, Norbert Winkhofer, Dietmar Stalke, Herbert W. Roesky, Andreas Voigt |
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| Rok vydání: | 1996 |
| Předmět: |
Silicon
010405 organic chemistry Stereochemistry chemistry.chemical_element Substrate (chemistry) General Chemistry 010402 general chemistry 01 natural sciences Biochemistry Catalysis 0104 chemical sciences Crystallography Colloid and Surface Chemistry chemistry Group (periodic table) Cluster (physics) Molecule Hydroformylation Bar (unit) |
| Zdroj: | Journal of the American Chemical Society. 118:8580-8587 |
| ISSN: | 1520-5126 0002-7863 |
| DOI: | 10.1021/ja952986w |
| Popis: | The reactions between the cobalt carbonyl anchored silanetriol Co3(CO)9CSi(OH)3 (1) and EMe3 (E = Al, Ga and In) in THF result in the formation of the respective group 13 heterosiloxanes [Co3(CO)9CSiO3E·THF]4 (Al (2); Ga (3); In (4)) in good yields. The new heterosiloxanes have been extensively characterized by means of their analytical and spectroscopic (mass, IR, and NMR) data. Additionally, the molecular structure of the Al complex 2 has been determined by X-ray diffraction studies. The compound contains a cubic Al4O12Si4 core with four Co3(CO)9C cluster units anchored on each of the silicon atoms at the alternating corners of the cube. Interestingly, there are three different types of Co3(CO)9C cluster units within the same molecule based on the mode of coordination of the CO ligands. In order to test the utility of these compounds in catalytic conversions, hydroformylation reactions involving 1-hexene as substrate have been carried out at 120 °C under a H2/CO initial pressure of 70 bar. A series of s... |
| Databáze: | OpenAIRE |
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