Chemical transformations of a SiO2-supported [Fe5RhC(CO)16]? cluster and catalysis of propylene hydroformylation

Autor: Boris N. Kuznetsov, N. M. Mikova, V. I. Koval'chuk, A. F. Savitskii, Nikolai V. Chesnokov
Rok vydání: 1995
Předmět:
Zdroj: Russian Chemical Bulletin. 44:611-620
ISSN: 1573-9171
1066-5285
Popis: Chemical transformations of SiO2-supported [Fe5RhC(CO)16]− and [Fe4RhC(CO)14]− clusters in Ar, CO, and synthesis gas are studied by IR spectroscopy, Mossbauer spectroscopy, and transmission electron microscopy. It is shown that partial transformation of the [Fe5RhC(CO)16]− cluster to the [Fe4RhC(CO)14]− cluster occurs immediately after its deposition on the substrate surface with the simultaneous formation of Fe2+ ions. The complete conversion of the supported [Fe5RhC(CO)16]− cluster to [Fe4RhC(CO)14]− is observed at 323 K in the synthesis gas. At 373 to 423 K [Fe5RhC(CO)16]− transforms into a mixture of Fe4Rh2C(CO)16, [Fe4RhC(CO)14]−, and [Fe53Rh3C(CO)15]− clusters. In the 523 to 623 K range, the supported [Fe5RhC(CO)16]− cluster decarbonylates completely to form bimetallic species A 5 A in size. Silica-supported FeRh clusters are active in propylene hydroformylation at 423 to 473 K and form a mixture of butyl alcohols and butyraldehydes.
Databáze: OpenAIRE
Externí odkaz: