Perez catalyst

Perez-Ramirez, J. (2002) Catalyzed N2O Activation, Promising (new) Catalyst for Abatement and utilization , PhD Thesis dissertation, TU-Delft, The Netherlands. 

A combination of a metathesis and a Pauson-Khand reaction, which leads to tricyclic compounds starting from diene-ynes, has been described by Perez-Castells and colleagues [262]. Treatment of the Co-complex 6/3-86, obtained from the corresponding alkyne in 75 % yield, with 5 mol% of the Ru-catalyst 6/3-13 for 18 h, followed by addition of an N-oxide as trimethylamine-N-oxide (TMANO) or NMO as copromoters, gave 6/3-87 in 81% yield. 

Chianelli, R. R. Perez De la Rosa, M. Meitzner, G., et al., Synchrotron and Simulations Techniques Applied to Problems in Materials Science Catalysts and AZULMAYA Pigments. J. Synchrotron Rad, 2005. 12 pp. 129-134. 

Perez-Pietro et al. have introduced the dirhodium complex (105) with a unique o/7/io-metalated arylphosphine ligand. The complex is an efficient catalyst for the cyclization of alkenyl diazo ketones (Scheme 7S).288 289... 

Blanco, R.M., Terreros, P., Fernandez-Perez, M., Otero, C. and az-Gonzalez, G. (2004) Functionalization of mesoporous silica for lipase immobilization Characterization of the support and the catalysts. Journal of Molecular Catalysis B-Enzymatic, 30, 83-93. 

Perez and co-workers reported the electron-deficient copper homoscorpionate catalyst TpBr3Cu(NCMe)-catalyzed nitrene insertion into C-H bonds of toluene, mesitylene, and cyclohexane, which are very unreactive substrates (Equations (100)—(102)). In contrast to the former reports, they obtained very high yields for these products. 

With regard to the selectivity of the ammoxidation, Sn—Sb—O catalysts are superior to bismuth molybdates. According to Germain and Perez... 

Perez-Balderas F, Ortega-Munoz M, Morales-Sanfrutos J et al (2003) Multivalent neogly-coconjugates by regiospecific cycloaddition of alkynes and azides using organic-soluble copper catalysts. Org Lett 5( 11) 1951—1954... 

To obtain a more realistic estimation of the behavior of an autocatalytic reaction under adiabatic conditions, it is possible to identify the kinetic parameters of the Benito-Perez model from a set of isothermal DSC measurements. In the example shown in Figure 12.11, the effect of neglecting the induction time assumes a zero-order reaction leading to a factor of over 15 during the time to explosion. Since this factor strongly depends on the initial conversion or concentration of catalyst initially present in the reaction mass, this method must be applied with extreme care. The sample must be truly representative of the substance used at industrial scale. For this reason, the method should be only be applied by specialists. 

Bernal, S., Calvino, J.J., Cauqui, M.A., Gatica, J.M., Larese, C., Perez Omil, J.A. and Pintado, J.M. (1999) Some recent results on metal/support interaction effects in NM/Ce02 (NM noble metal) catalysts. Cataly. Today, 50, 175. 

Shortly after the discovery by He and coworkers, Diaz-Requejo and Perez et al. reported an intriguing silver-pyrazolylborate system that catalyzes the amination of aliphatic hydrocarbons.26 Earlier, they had developed a similar copper-pyrazolylbo-rate system that could also catalyze the C-H amination reaction. However, a different ligand was required with the silver catalyst system. 

Cyclohexane is a saturated hydrocarbon in which no regioselectivity problems of C-H insertion can occur. The reaction of cyclohexane with ethyl diazoacetate was investigated in a thorough study by Perez et al.14 The /V-heterocyclic carbene ligand IPr (IPr= l,3-bis(diisopropylphenyl)imidazol-2-yliden) was used, all three compounds IPrMCl (M = Cu, Ag, Au) were inactive as catalysts in cyclohexane (Table 12.2, entry 1). Addition of the sodium BARF salt (NaB[3,5-(CF3)2C6H3]4) gave ethyl cyclohexyl acetate as the C-H insertion product of the carbene (Scheme 12.4). 

Abello, S., Medina, F., Tichit, D., Perez-Ramirez, J., Cesteros, Y., Salagre, P. and Sueiras, J. E. Nanoplatelet-based reconstructed hydrotalcites towards more efficient solid base catalysts in aldol condensations, Chem. Commun., 2005, 1453-1455. 

Figure 9.11. Dioxygen uptake plots for the autoxidation of 1-decanethiol in the presence of [CoPcTs]4- as catalyst (a) unsupported and (b) supported on a MgAl-LDH. A shorter induction time and a larger turnover frequency were obtained for the LDFI assembly compared with the homogeneous case. After Perez Bernal et al. [124],...

Mul et al., 2003). More reducible oxide moieties (e.g., alumina-supported chromia) exhibited partial reduction during reaction (Puurunen and Weckhuysen, 2002 Puurunen et al., 2001). The average oxidation state of a particular catalyst will depend on the hydrocarbon-to-C>2 ratio in the feed (Garcfa-Cortez and Banares, 2002) and on the presence of other reactants. For example, a typical propane ammoxidation feed, which also contains ammonia, results in a more reduced catalyst than a propane ODH feed (Guerrero-Perez and Banares, 2002). 

FIGURE 16 Raman spectra recorded during propane ammoxidation on alumina-supported nanocrystalline V-Sb-O system and simultaneous activity data determined by online gas chromatography (Guerrero-Perez M.O., and Banares, M.A. Chem. Commun. 1292 (2002), Operando Raman study of alumina-supported Sb-V-O catalyst during propane ammoxidation to acrylonitrile with on line activity measurement, reproduced with permission of the Royal Society of Chemistry) (Guerrero and Banares, 2002). 

Corma A., Frontela J., Labaro J. and Perez M., Proceedings of the Symposium on Alkylation, Aromatization, Oligomerization and Isomerisation of short Chain Hydrocarbons over Heterogeneous Catalysts , (Prepr. -Am. Chem. Soc., Div. Pet. Chem., 1991) 36 (4), 833. 

Bernal S, Botana FJ, Calvino JJ, Perez-Omil JA (1995) HREM study of the behaviour of a Rh/CeO catalyst under high temperature reducing and oxidizing conditions. Catal Today 23 219... 

Corey, E. J., Noe, M. C., Guzman-Perez, A. Kinetic Resolution by Enantioselective Dihydroxylation of Secondary Allylic 4-Methoxybenzoate Esters Using a Mechanistically Designed Cinchona Alkaloid Catalyst. J. Am. Chem. Soc. 1995, 117, 10817-10824. 

Goldwasser, M.R., Rivas, M.E., Pietri, E., Perez-Zurita, M.J., Cubeiro, M.L., Grivobal-Constant, A., and Leclercq, G. Perovskites as catalysts precursors Synthesis and characterization. Journal of Molecular Catalysis. A, Chemical, 2005, 228, 325. 

In 1993, Perez et al. reported norbornene polymerization in aqueous emulsion at 70 °C using PdCl2 as a catalyst precursor [92, 93]. A stable latex consisting of low-molecular-weight oligomeric material (degree of polymerization DP ca. 10) was obtained with low catalyst activities (70 TO h ). Very small latex particles of 10 to 20 nm diameter were reported. In the free radical polymerization of olefinic monomers such small particles are only obtained by microemulsion polymeriza-... 

Domenech, A., Perez, J., Kapteijn, R, Ribera, A., and Moulijn, J.A. 2002d. Characterization of iron centers in ex-framework FeZSM-5 catalyst by electrochemical methods. Catalysis Letters 78, 302-312. 

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