Grünberg, A. ; Gutmann, T. ; Rothermel, N. ; Xu, Y. P. ; Breitzke, H. ; Buntkowsky, G. (2013)
Immobilization and Characterization of RuCl2(PPh3)(3) Mesoporous Silica SBA-3.
In: Zeitschrift Fur Physikalische Chemie-International Journal of Research in Physical Chemistry & Chemical Physics, 227 (6-7)
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The five-fold coordinated ruthenium (II) catalyst RuCl2(PPh3)(3) is heterogenized on the surface of amine functionalized mesoporous silica material SBA-3 and studied by BET, XRD and P-31 CP-MAS solid-state NMR. The spectra indicate the replacement of one or two of the triphenyl-phosphine groups in the course of the grafting. To distinguish between both possibilities two-dimensional J-resolved P-31 MAS solid-state NMR combined with quantum chemical calculations is employed. The changes of the scalar coupling pattern between the neat catalyst and the immobilized catalyst suggest the replacement of two of the PPh3-groups by coordinative bonds to the amine-functions of the linker. DFT calculations reveal the absence of two chemically and magnetically equivalent phosphines and confirm the replacement of two PPh3-groups. This finding is similar to the results observed for the binding of the rhodium in the Wilkinson's catalyst, despite the different coordination of the metals (four-fold versus five-fold), the presence of two chlorine ligands and the different transition metal.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2013 |
| Autor(en): | Grünberg, A. ; Gutmann, T. ; Rothermel, N. ; Xu, Y. P. ; Breitzke, H. ; Buntkowsky, G. |
| Art des Eintrags: | Bibliographie |
| Titel: | Immobilization and Characterization of RuCl2(PPh3)(3) Mesoporous Silica SBA-3 |
| Sprache: | Englisch |
| Publikationsjahr: | 2013 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Zeitschrift Fur Physikalische Chemie-International Journal of Research in Physical Chemistry & Chemical Physics |
| Jahrgang/Volume einer Zeitschrift: | 227 |
| (Heft-)Nummer: | 6-7 |
| URL / URN: | http://apps.webofknowledge.com/full_record.do?product=WOS&se... |
| Kurzbeschreibung (Abstract): | The five-fold coordinated ruthenium (II) catalyst RuCl2(PPh3)(3) is heterogenized on the surface of amine functionalized mesoporous silica material SBA-3 and studied by BET, XRD and P-31 CP-MAS solid-state NMR. The spectra indicate the replacement of one or two of the triphenyl-phosphine groups in the course of the grafting. To distinguish between both possibilities two-dimensional J-resolved P-31 MAS solid-state NMR combined with quantum chemical calculations is employed. The changes of the scalar coupling pattern between the neat catalyst and the immobilized catalyst suggest the replacement of two of the PPh3-groups by coordinative bonds to the amine-functions of the linker. DFT calculations reveal the absence of two chemically and magnetically equivalent phosphines and confirm the replacement of two PPh3-groups. This finding is similar to the results observed for the binding of the rhodium in the Wilkinson's catalyst, despite the different coordination of the metals (four-fold versus five-fold), the presence of two chlorine ligands and the different transition metal. |
| Freie Schlagworte: | rucl2(pph3)(3) heterogeneous catalysis solid-state-nmr mas scalar interactions quantum-chemical calculations solid-state nmr cyclohexene hydroformylation sio2-tethered catalyst dihydrogen complexes phosphine complexes wilkinsons complex metal-complexes 1st observation hydrogenation oxidation |
| Zusätzliche Informationen: | 186NB Times Cited:1 Cited References Count:67 |
| Fachbereich(e)/-gebiet(e): | 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Physikalische Chemie |
| Hinterlegungsdatum: | 27 Okt 2014 20:41 |
| Letzte Änderung: | 28 Mai 2019 12:10 |
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