Investigation of the Formation Reaction and Structural Characterization of the 'Platinum Grignard Reagent' [Pt(MgCl)2(THF)x] by Extended X-ray absorption fine structure (EXAFS) and Other methods
| Autor: | Deborah J. Jones, Borislav Bogdanović, Uwe Kolb, Jacques Rozière, Lorraine E. Aleandri, Ursula Wilczok, Sara C. Huckett, Martin Lagarden, Christine Dürr |
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| Rok vydání: | 1997 |
| Předmět: |
Extended X-ray absorption fine structure
Magnesium Reaction formation Organic Chemistry Inorganic chemistry chemistry.chemical_element General Chemistry Catalysis Spectral line Characterization (materials science) chemistry.chemical_compound Crystallography chemistry Reagent Platinum Tetrahydrofuran |
| Zdroj: | Chemistry - A European Journal. 3:1710-1718 |
| ISSN: | 1521-3765 0947-6539 |
| DOI: | 10.1002/chem.19970031020 |
| Popis: | The „platinum Grignard reagent” [Pt(MgCl)2(THF)x] (2), obtained by the reaction of PtCl2 and Et2Mg in a 1:2 molar ratio, as well as finely divided platinum (Pt*)—a possible intermediate formed during the preparation of 2—have been investigated by EXAFS spectroscopy at the PtLII edge. Parallel investigations were carried out on Pt* obtained from PtCl2 and (9,10–dihydro-9,10-an-thracenediyl)tris(tetrahydrofuran)magnesium (MgA), and on 2 obtained from Pt*, MgA, and MgCl2. The EXAFS results suggest that Pt* consists of extremely small particles (≈ 5–11 A) with strongly reduced Pt–Pt distances compared to bulk Pt (≈ 0.09 A). The EXAFS spectra of 2 indicate the presence of Mg shells in addition to Pt shells in the Pt environment; Mg atoms are at a bonding distance from Pt atoms (2.78–2.80 A). These results suggest that 2 consists of very small Pt–Mg clusters and confirm their formation from organomagnesium reagents and PtCl2 or Pt*. |
| Databáze: | OpenAIRE |
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