Propane, decomposition activated complex

In 1966, Nozaki et al. reported that the decomposition of o-diazo-esters by a copper chiral Schiff base complex in the presence of olefins gave optically active cyclopropanes (Scheme 58).220 221 Following this seminal discovery, Aratani et al. commenced an extensive study of the chiral salicylaldimine ligand and developed highly enantioselective and industrially useful cyclopropanation.222-224 Since then, various complexes have been prepared and applied to asymmetric cyclo-propanation. In this section, however, only selected examples of cyclopropanations using diazo compounds are discussed. For a more detailed discussion of asymmetric cyclopropanation and related reactions, see reviews and books.17-21,225... 

Fe-FER, Fe-BEA, and Fe-MFI catalysts prepared by the proposed method provide for high catalytic activity in all three test reactions, i.e. NO oxidation (see Fig. 4), SCR of NO by propane (see Fig. 5), and N2O decomposition, showing 50 % conversion of N2O at 350 °C for all three iron-zeolite samples with Fe/Al value of about 0.05. For the same iron content activity of the Fe-MFI sample in NO oxidation is lower in comparison with Fe-FER and Fe-BEA samples, both reaching the equilibrium NO2/NO composition for temperature above 300°C. In the SCR reaction the picture is more complex, with Fe-MFI showing higher activity at lower temperatures and then decreasing at temperatures above 350°C. Significantly, the selectivity of the process, i.e. the... 

J. Y. Luo et al synthesized the mesoporous La-Co-Ce-O composit oxide by citric acid complexation-organic template decomposition method. The catalysts prepared by this method had a high specific surface area about 95-156.6 m. g with very uniform pore diameter (3.7-3.95 nm) (changing with the different component and calcination temperature). The catalysts were used in catalytic CO oxidation and propane oxidation, and the excellent catalytic properties and thermal stability can be observed. In the case of CO oxidation, the reaction temperatures for 50% (Tso) and 90% CO (Tgo) conversion are 140 °C and 169 °C, respectively, over mesoporous La-Co-Ce-0 eomposit oxide catalysts, which are 39 and 30 lower than those over the catalyst prepared by co-preeipitation method (LCC (0.5)-CP-500 catalyst) in the case of propane oxidation, the 301 °C and 341 °C reaction temperature are required for the Tso and Tgo, which are 29 and 64 lower than those over the LCC (0.5)-CP-500 catalyst. In addition, the ordered mesoporous strueture of catalyst was conductive to the dispersion and transmission of the reactants, and therefore the inner surface of catalyst was fully utilized, which benefited the increase in catalytic activity and efficiency by the easy accessibility, and as well as the decrease in resistance of mass-transfer. As a result, excellent catalytic properties for CO oxidation and propane oxidation can be obtained over mesoporous lanthanum-containing composite oxide catalysts [87],... 

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