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Kolekcje
Inne
Rhodium complexes supported on zinc aluminate spinel as catalysts for hydroformylation and hydrogenation: preparation and activity.
Autorzy
Rok wydania
2002
Czasopismo
Journal of Molecular Catalysis A-Chemical
Numer woluminu
189
Strony
203-210
DOI
10.1016/S1381-1169(02)00073-0
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The heterogenization of active homogeneous rhodium catalysts on zinc aluminate spinel has been studied. The ZnAl2O4 support was prepared by a hydrothermal process and characterized by transmission electron microscope (TEM), RTG, and textural investigations. The rhodium(I) complexes, Rh(acac)(CO)2, Rh(acac)(CO)(PPh3), and RhCl(CO)(PPh3)2, supported on the spinel, gave Rh(CO)2+, Rh(CO)(PPh3)+, and Rh(CO)(PPh3)2+ species, respectively, as confirmed by IR spectra. Rh(CO)2+ on the spinel with an excess of PPh3 effectively catalysed the hydroformylation of 1-hexene under 1 MPa of H2/CO at 356 K. Aldehydes yield of 40–95% were obtained with an n/iso ratio of ca. 3. The coordination of 1-hexene to supported Rh(CO)2+ species was evidenced by the appearance of a ν(CO) band at 2053 cm−1. Rh(CO)2+-supported on the spinel catalysed the hydrogenation of nitrobenzene and chloronitrobenzene at 1 MPa of H2 and 356 K with a TON of 400–500 h−1.The ZnAl2O4 support was prepared by a hydrothermal process and characterized by TEM, RTG, and textural investigations. The heterogenization of rhodium(I) complexes Rh(acac)(CO)2, Rh(acac)(CO)(PPh3), and RhCl(CO)(PPh3)2, gave Rh(CO)2+, Rh(CO)(PPh3)+, and Rh(CO)(PPh3)2+ species, respectively, as confirmed by IR spectra. Rh(CO)2+ on the spinel with an excess of PPh3 effectively catalysed the hydroformylation of 1-hexene under 1 MPa of H2/CO at 356 K. Aldehydes yield of 40–95% were obtained with an n/iso ratio of ca. 3. The coordination of 1-hexene to supported Rh(CO)2+ species was evidenced by the appearance of a (CO) band at 2053 cm−1. Rh(CO)2+ supported on the spinel catalysed the hydrogenation of nitrobenzene and chloronitrobenzene at 1 MPa of H2 and 356 K with a TON of 400–500 h−1.
Słowa kluczowe
Zinc aluminate spinel, Hydrothermal process, Supported rhodium complexes, Hydroformylation, Hydrogenation
Adres publiczny
https://doi.org/10.1016/S1381-1169(02)00073-0
Strona internetowa wydawcy
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