From homogeneously to heterogeneously catalyzed cyclopropanation reactions:new polymeric membranes embedding cobalt chiral Schiff base complexes
Articolo
Data di Pubblicazione:
2010
Citazione:
From homogeneously to heterogeneously catalyzed cyclopropanation reactions:new polymeric membranes embedding cobalt chiral Schiff base complexes / A. Caselli, M.G. Buonomenna, F. de Baldironi, L. Laera, S. Fantauzzi, F. Ragaini, E. Gallo, G. Golemme, S. Cenini, E. Drioli. - In: JOURNAL OF MOLECULAR CATALYSIS. A: CHEMICAL. - ISSN 1381-1169. - 317:1-2(2010), pp. 72-80.
Abstract:
In this paper we report the preparation of catalytic polymeric membranes having the complex [(N,N'-bis(3-tert-butyl-5-(heptadecafluorooctyl)salicylidene)-trans-1,2-cyclohexanediamine )Co] embedded into Hyflon AD60X, PES and PSf and their use in the cyclopropanation reaction of olefins with ethyl diazoacetate (EDA). A study of the reaction in the homogeneous phase was also performed. The kinetics of the cyclopropanation reaction is first-order in the diazoacetate and the catalyst and zero order in the olefin, but we observed a more complex dependence on the additive, NMI (N-methylimidazole). The positive effect of the additive is completely reversed at NMI concentration higher than 6.10(-2) M.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Cobalt; Schiff bases; Membranes; Heterogeneous catalysis; Homogeneous catalysis; Cyclopropanation reactions
Elenco autori:
A. Caselli, M.G. Buonomenna, F. de Baldironi, L. Laera, S. Fantauzzi, F. Ragaini, E. Gallo, G. Golemme, S. Cenini, E. Drioli
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