Decomposition catalyzed

The Yield of Free Radical Generation (e) in Reactions of Hydroperoxide Decomposition Catalyzed by Transition Metal Complexes... 

Rate Constants kd and Induction Periods t of Hydroperoxide Decomposition Catalyzed by Mo and MoS2 Powder in Hydrocarbon Mixture (Fuel T-6) [10]... 

O. Ozturk, et ah, Thermal decomposition of generation-4 polyamidoamine dendrimer films decomposition catalyzed by dendrimer-encapsulated R particles, Langmuir 21, 3998-4006 (2005). 

In the presence of approximately 1% cobalt naphthenate in benzene, only 4 hours at 100°C. were required to decompose the hydroperoxide almost completely. The yields of products from decompositions catalyzed by some commonly used cobalt and vanadium (1) compounds are given in Table I. Polymerization appears to be the major reaction. 

The major concern is that the character of the sample is not changed in the injection port, the column, or the detector prior to its actual detection. Thermal decomposition, catalyzed or thermal reaction, and adsorption of part or all of the sample will contribute to error in the analysis. Problems such as these may be determined by using the chromatograph itself first to detect possible problems by unexpected results and then confirmation of the problem by variation of the actual operating parameters of the chromatograph. 

Also the reaction pathways of Sarin decomposition catalyzed by selected forms of MgO were investigated [38]. In the case of the decomposition on the nonhydroxylated MgO surface, the removal of fluorine from Sarin was modeled. Fluorine was transferred from Sarin into binding distance with the Mg atom of the MgO surface (Fig. 13.9). It was revealed that such a structure provides a reliable model for the reaction mechanism. A two-step reaction mechanism was assumed. In the first step, Sarin creates a stable adsorbed complex with MgO through three chemical bonds with the MgO surface (the Al-GB model). It is expected that the transfer of the fluorine atom to the surface of MgO is accompanied by a change in the conformation of Sarin. In the second step, the bond between P and F is broken (the Al(t)-GB model) the fluorine atom is transferred to the Mg atom of the surface and the remaining part of Sarin adopts the most energetically favorable conformation (the Al(f)-GB model). 

The thermally initiated oxidation of SO2 has also been studied, Russell and Smith " found that mixtures of SO2 and O2 which were allowed to stand over certain metal catalysts produced SO 3 even at room temperature. Flint and Lindsay have reported that at temperatures of 200-900 °C no oxidation occurs except that due to heterogenous decomposition catalyzed by silica above about 700 °C. Recently, Cullis et studied the system and concluded that an ap-... 

We demonstrated that the observed rate law was not due to rapid initiator decomposition catalyzed by 8. Instead, low initiation efficiency is a fundamental property of 8, along with its very electron-rich vinyl group and its ability to provide a significant resonance interaction to the chain radical a to the ring. 

The kinetics of oil shale char gasification have been studied for Colorado oil shale from the Parachute Creek member. Reaction rate expressions similar to those previously reported for coal char were obtained for the H20-char, C02-char and water gas shift reactions. Evidence is presented to suggest that CaO, a product of mineral decomposition, catalyzes the H20-char reaction and that indigeneous iron catalyzes the water gas shift reaction. 

Shimanovich, R. and J.T. Groves (2001). Mechanisms of peroxynitrite decomposition catalyzed by fetmps, a bioactive sulfonated iron porphyrin. Arch. Biochem. Biophys. 387, 307-317. 

O. Ozturk, T.J. Black, K. Petrine, K. Pizzolato, C.T. WilUanis, E.W. Parsons, J.S. Ratliff, J. Gao, C.J. Murphy, H. Xie, H.J. Ploehn, D.A. Chen, Thermal Decomposition of Generation Polyamidoamine Dendrimer Films Decomposition Catalyzed by Dendrimer-Encapsulated Pt Particles, Langmuir 21, 3998, 2005. 

Fig. 1. Catal5rtic cycle for HCOOH decomposition, catalyzed by [Rh(Cp )(bipy)(H20)] in D2O. The rate-determining step may be the 8-hydrogen elimination to afford the hydride complex, accompanied by CO2 evolution. Reprinted from Ref 43, cop50 ight 2008, with kind permission from Wiley-VCH Verlag GmbH Co.

Figure 4.26. N2O decomposition catalyzed by Fe/ZSM-5. Cluster model of the binuclear iron oxide-hydroxide site ].

The N2O decomposition reaction is especially interesting because under particular conditions the reaction can be induced to oscillate (see Fig. 4.28l l). If non-isothermal effects can be excluded, this implies the presence of an auto-catalytic elementary reaction step in the overall catalytic reaction cycle (see Chapter 8). In this case, the auto-catalysis results from N2O decomposition catalyzed by both mono-center and bi-center iron complexes. 

Scheme 11.2 Proposed mechanism of H2O2 decomposition catalyzed by Mn complexes based on ligand 2 [36].

Figure 12.23 The selective CVD process based on WFg decomposition catalyzed during the nucleation step by Si for the initial reaction in the absence of H2 and the growth reaction catalyzed by W in the presence of H2.

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