Rational, Facile Synthesis and Characterization of the Neutral Mixed‐Metal Organometallic Oxides Cp* 2 Mo x W 6– x O 17 (Cp* = C 5 Me 5 , x = 0, 2, 4, 6)
| Autor: | Funda Demirhan, Laure Vendier, Rinaldo Poli, Gülnur Taban-Çalışkan, Dominique Agustin |
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| Rok vydání: | 2009 |
| Předmět: |
Thermogravimetric analysis
Mixed metal Aqueous medium 010405 organic chemistry Inorganic chemistry Infrared spectroscopy chemistry.chemical_element Tungsten 010402 general chemistry 01 natural sciences 0104 chemical sciences Characterization (materials science) Inorganic Chemistry Crystallography chemistry Molybdenum X-ray crystallography |
| Zdroj: | European Journal of Inorganic Chemistry. 2009:5219-5226 |
| ISSN: | 1099-0682 1434-1948 |
| DOI: | 10.1002/ejic.200900676 |
| Popis: | The reaction of the bis(pentamethylcyclopentadienyl)pentaoxidodimetal complexes Cp*2M2O5 with four equivalents of Na2M′O4 (M, M′ = Mo, W) in acidic aqueous medium constitutes a soft and selective entry into neutral Lindqvist-type organometallic mixed-metal oxides Cp*2MoxW6–xO17 [x = 6 (1), 4 (2), 2 (3), 0 (4)]. The identity of the complexes is demonstrated by elemental analyses, thermogravimetric analyses and infrared spectroscopy. Thermal degradation of 1–4 up to above 500 °C leads to Mox/6W1–x/6O3. The molecular identity and geometry of compound 2 is further confirmed by a fit of the powder X-ray diffraction pattern with a model obtained from previously reported single-crystal X-ray structures of 1 and 4, with which 2 is isomorphous. DFT calculations on models obtained by replacing Cp* with Cp (I–IV) validate the structural assignments and assist in the assignment of the M,M′–O vibrations. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009) |
| Databáze: | OpenAIRE |
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