Ítem
| Ministerio de Ciencia y Tecnología (Espanya) | |
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Real i Obradors, Juli
Prat-Gil, Esther Pagès-Barenys, Montserrat Polo Ortiz, Alfonso Piniella, Joan F. Álvarez-Larena, Ángel |
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Ligand 2-diphenylphosphinothiophenol (Hsarp) reacted with Pt(PPh3)4 to yield trans-[PtH(sarp)(PPh3)], which undergoes fast exchange with free PPh3 on the NMR time scale and very slowly and reversibly formed some cis-[PtH(sarp)(PPh3)] over time in solution (11%, 24 h). Reaction of trans-[PtH(sarp)(PPh3)] with Hsarp in boiling toluene gave cis- And trans-[Pt(sarp)2]; the cis isomer being more stable. These complexes were characterized by 1H and 31P NMR and also analyzed by XRD in the case of trans-[PtH(sarp)(PPh3)], trans-[Pt(sarp)2], and cis-[Pt(sarp)2]. trans-[PtH(sarp)(PPh3)] was evaluated as a preformed, tin-free hydroformylation catalyst on styrene and found active at 100 °C, at pressures over 75 bar, yielding phenylpropanal (regioselectivities up to 83% in 2-phenylpropanal), with total conversions to aldehydes up to 100% at styrene/platinum ratios from 400/1 to 1000/1 and minimal hydrogenation products This work was financially supported by the Dirección General de Enseñanza Superior e Investigación Científica (DGESIC) of Spain though project BQU2002-04070-C02 |
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| http://hdl.handle.net/2072/297677 | |
| spa | |
| Royal Society of Chemistry (RSC) | |
| Tots els drets reservats | |
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Metalls de transició -- Compostos
Transition metal compounds Reaccions químiques Chemical reactions Funcional de densitat, Teoria del Density functionals |
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| Platinum phosphinothiolato hydride complexes: Synthesis, structure and evaluation as tin-free hydroformylation catalysts | |
| info:eu-repo/semantics/article | |
| Recercat |
