Synthesis of Rhodium (I) Complexes with Mono and Dithiolato Ligands: Application in Catalytic Hydroformylation of Olefins
DOI:
https://doi.org/10.29356/jmcs.v51i1.1337Keywords:
Thiolato ligands, sulphur ligands, binuclear complex, rhodium complex, homogeneous catalysis, hydroformylationAbstract
Abstract. The thiols,1-phenylethanothiol 1 and 2,4-pentanodithiol 2 were synthesised and used to prepare binuclear rhodium species 3, 4 of the type [Rh2(ìμL)n(cod)2] (L = 1, n = 2; L = 2, n = 1; cod = 1,5cyclooctadiene). NMR and FAB+ mass spectrometry data are consistent with a binuclear structure for the species. These complexes, plus PPh3 or diphosphines (dppp, dppb), were used as catalytic precursors for the hydroformylation of styrene under mild conditions. Fairly good activities and regioselectivities were achieved for catalytic system 3/ PPh3.
Resumen. Los tioles,1-feniletanotiol 1 and 2,4-pentanoditiol 2 fueronsintetizados y empleados para preparar especies binucleares de rodio 3, 4 de formulación [Rh2(ìμL)n(cod)2] (L = 1, n = 2; L = 2, n = 1; cod = 1,5-ciclooctadieno). Los espectros de RMN y espectrometría de masas FAB+ son consistentes con una estructura binuclear para estas especies. Estos complejos junto con Pö3 o difosfinas (dppp, dppb), fueron usados como precursores catalíticos en la hidroformilación de estireno en condiciones suaves de reacción. Con el sistema catalítico 3/PPh3 se alcanzaron buenas actividades y selectividades.
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