Oxides tabulated data

Thermodynamic Functions of the Gases. To apply Eqs. (1-10), the free energies of formation, Ag , for all gaseous species as a function of temperature are required. Tabulated data were fit by a least-squares procedure to derive an analytical equation for AG° of each vapor species. For the plutonium oxide vapor species, the data calculated from spectroscopic data (3 ) were used for 0(g) and 02(g), the JANAF data (.5) were used and for Pu(g), data from the compilation of Oetting et al. (6) were used. The coefficients of the equations for AG° of the gaseous species are included in Table I. 

The tabulated data have been obtained for the vapor phase decomposition of ethylene oxide (A) into methane and carbon monoxide at 414.5°C (Heppert Mack, JACS 5J 2706, 1929). Show that the rate equation is first order, nt = 2na0-na... 

Preparation of bromine by oxidizing hydro-bromic acid by manga-nese(IV) oxide Drawing of apparatus. Reaction equations. Required calculations. Tabulated data (b.p. of bromine, density, etc.) When the reaction mixture is heated, a brown bromine vapour condensing as a heavy reddish brown liquid evolves... 

Removal of two electrons from the formal cyclic 87r-electron structures serves to produce potential Hiickel 4n + 2 aromatic systems. The loss of one electron to form a radical cation was referred to in Section 2.26.2.1, and removal of a second electron by electrochemical oxidation, leading to dicationic structures, has also been achieved for a wide range of unsaturated compounds with heteroatoms in the 1,4 positions (70ZC147, 73JA2375). The oxidations are discussed further in Section 2.26.3.1.5, where tabulated data are presented. An interesting feature is the stability of certain salts of the dications, some of which have been isolated. 

In Table VII are recorded mean values for in a number of ethylene-metal carbonyl complexes and parent metal carbonyls as well as values for the double-bond infrared stretching frequency rc c the magnetic shielding parameter t for ethylene in those transition metal complexes for which data are available. Although with the metal carbonyl complexes, differences of geometry, oxidation state, etc., do not permit a correlation to be drawn between the absolute values of rco and for the various complexes, it is quite apparent from the tabulated data for the Mo, Mn, and Fe complexes that for a given metal. 

Since the original observation (443) of the oxidation of ferrocene to the ferrocenium ion ( ° = 0.31 V, 0.2 M LiC104 in MeCN) (444), the formal potentials of well over 100 derivatives have been determined. Numerous studies assessing the effect of substitution on E° have been reported tabulated data and a discussion of the significance of the observed trends are available elsewhere (445, 446). As expected, donor substituents render the compound more easily oxidized so that, for example, [Fe(M-CsMe )2] has an ° value of -0.12 V in MeCN (447). 

In two papers Shao et al. predicted the E ox of sulfones and functionalized sulfones [60, 61]. Influenced by [28], the solvent E ox was taken as the difference of two free energy cycles - one for solvent oxidation and one for Li" reduction - and in part invoking tabulated data as input for the reference cycle [60]. However, new to the approach was the calculation of AGsoiv(Li ) at the experimentally determined solvent dielectric constants, which introduced a solvent dependence in the floating, rather than fixed, reference potential. The reference potentials depended on the specific computational approach, but were approximately 2.5-3.0 eV. The reference potential difference between the low (e=8) and high (e=95) dielectric solvents was 0.5 eV [60]. Thus, both the absolute numbers and the variation with solvent were large compared to the fixed LE/Li reference of 1.4-1.5 eV used by other authors [16, 57]. 

Data are given in Table 10-7 to illustrate certain facets of the Marcus cross relation. They refer to six reactions in which the cage complex Mn(sar)3+ is reduced or Mn(sar)2+ oxidized.34 These data were used to calculate the EE rate constant for this pair. The results of the calculation, also tabulated, show that there is a reasonably self-consistent value of fcEE for Mn(sar)3+/Mn(sar)2+ lying in the range 3-51 L mol-1 s-1. When values34 for an additional 13 reactions were included the authors found an average value of kEE = 17 L mol 1 s l. 

The DSC and TGA plots of the oxidized polymer (VIII) showed that the Tm is 130°C and the weight loss of 20% and 80% was observed at 455°C and 600°C, respectively, compared to 400° and 482°C for the original polymer VII indicating the oxidized polymer was more stable to heat. This observation was consistent with the chemical structure of the oxidized polymer, which consisted of a repeating aromatic pyrrole structure and, therefore, should be more thermodynamically stable. The thermal data of the polymers are tabulated in Table II. 

A different view of the OMT process is that the molecule, M, is fully reduced, M , or oxidized, M+, during the tunneling process [25, 26, 92-95]. In this picture a fully relaxed ion is formed in the junction. The absorption of a phonon (the creation of a vibrational excitation) then induces the ion to decay back to the neutral molecule with emission (or absorption) of an electron - which then completes tunneling through the barrier. For simplicity, the reduction case will be discussed in detail however, the oxidation arguments are similar. A transition of the type M + e —> M is conventionally described as formation of an electron affinity level. The most commonly used measure of condensed-phase electron affinity is the halfwave reduction potential measured in non-aqueous solvents, Ey2. Often these values are tabulated relative to the saturated calomel electrode (SCE). In order to correlate OMTS data with electrochemical potentials, we need them referenced to an electron in the vacuum state. That is, we need the potential for the half reaction ... 

Data for the thermal decomposition of nitrous oxide on gold at 900°C and an initial pressure of 200 Torr are tabulated. Check the order of the reaction. 

Catalytic oxidation of carbon monoxide was studied at constant volume at 300 C and initial pressure of 204 torr. Data of time against drop in total pressure (Prettre Claudel, 26, 1970) are tabulated. They are fitted to a cubic polynomial,... 

Ethylene can be oxidized to ethylene oxide over a silver-alumina catalyst. Experimental data were obtained at 260 C and atmospheric pressure (Wan, Ind Eng Chem 45 234, 1951). Selected data are tabulated. Inlet... 

Although the catalyst did not recover in the reformate stream, the authors did indicate that the carbonate species could be removed by air treatment at temperatures > 400 °C. Ruettinger and coworkers452 reported on the mechanism of aging of Pt/ceria-zirconia mixed oxide catalysts. In that case, the authors followed the activity of a 2% Pt/Ce02-Zr02 catalyst at 228 °C in a feed containing 5.92% CO, 7.4% C02, 31.82% H2, 28.86% N2, and 26% H20, and observed the deactivation data tabulated in Table 86. 

The intent of this chapter is twofold. One is to give brief structural descriptions of many of the copper-oxide superconductors. For in-depth information, the reader is referred to the original publications. The second is to provide detailed crystallographic information (lattice constants, positional and thermal parameters, space groups, etc.), and compositional data on many of the superconductors discussed. Also, calculated x-ray powder diffraction patterns for these same compounds are tabulated. It is hoped that such information will prove useful to the superconductivity researcher. 

Data on the relationship between the work function of metals and the activation energy E for their oxidation has been tabulated by Ward and Bharucha (28). The equation proposed by Rideal and Wansbrough-Jones (5)... 

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