Hydrogen potential energy diagram

FIGURE 3 4 Potential energy diagram for rotation about the carbon-carbon bond in ethane Two of the hydrogens are shown in red and four in green so as to indicate more clearly the bond rotation... 

FIGURE 4 7 Potential energy diagram for proton transfer from hydrogen chio ride to tert butyl alcohol... 

FIGURE 4 12 Potential energy diagram for the reaction of tert butyl alcohol and hydrogen chloride according to the SnI mechanism... 

Sketch a potential energy diagram for the reaction of 1 heptanol with hydrogen bromide paying careful attention to the positioning and structures of the intermediates and transition states... 

Section 4 9 The potential energy diagrams for separate elementary steps can be merged into a diagram for the overall process The diagram for the reac tion of a secondary or tertiary alcohol with a hydrogen halide is charac terized by two intermediates and three transition states The reaction is classified as a ummolecular nucleophilic substitution, abbreviated as SnI... 

Figure 6.38. Potential energy diagram for the hydrogenation of ethylene to the ethyl (C2H5) intermediate on a palladium(m) surface. The zero of energy has been set at that of an adsorbed H atom, (a) Situation at low coverage ethylene adsorbed in the relatively stable di-cr bonded mode, in which the two carbon atoms bind to two metal atoms. In the three-centered transition state, hydrogen and carbon bind to the same metal atom, which leads to a considerable increase in the energy...

The interaction of hydrogen (deuterium) molecules with a transition metal surface c an be conveniently described in terms of a Lennard--Jones potential energy diagram (Pig. 1). It cxxislsts of a shallcw molecular precursor well followed by a deep atomic chemisorption potential. Depending on their relative depths and positions the wells m or may not be separated by an activation energy barrier E as schematically Indicated by the dotted cur e in Fig. 1. 

Figure 3.2. Potential energy diagram of chemisorption for the adsorption of hydrogen on nickel (after Le Page, 1987).

Schematic potential energy diagrams depicting the two paths of activation of hydrogen by Ag+ and showing the quantities which determine the energetics of each path are given in Fig. 1.

Fio. 1. Schematic potential energy diagrams for the homolytic (I) and heterolytic (II) splitting of hydrogen by Ag+. All processes and energy terms are in solution. D = dissociation energy I = ionization potential. [Webster, A. H., and Halpern, J., J. Phys. Chem. 61, 1239 (1967).]... 

Fig. 6. Schematic potential energy diagram for the adsorption of hydrogen on a metal surface.

Fig. 7. Potential energy diagram for van der Waals (aa) and chemisorbed hydrogen (66) [J. E. Lennard Jones, Trana. Faraday Soc. 28, 333 (1932)]. aQ and A5 represent heats of chemisorption and van der Waals adsorption. aF represents activation energy for chemisorption.

Fig. 5a. Potential energy diagram for the Is electron of a hydrogen atom at a distance of 5.5A. from a tungsten surface in the absence of external fields. I = ionization potential x = work function g = depth of Fermi sea Ph = proton-electron potential Pw = image potential.

Figure 9. Qualitative potential energy diagram for the diffusion of a hydrogen along the principal C3 axis of the [Nii2(CO)2iH]3" trianion, as estimated from closest Ni-H contacts...

B-9. To which point on the potential energy diagram for the reaction of 2-methylpropene with hydrogen chloride does the figure shown at the right correspond ... 

Fig. S.Potential energy diagrams of O—O hydrogen bonds and their associated H and 2H (D) NMR chemical shift differences, Ad...

Isotopic redistribution of HFAA with Bu OH/Bu OD in acetonitrile was measured and the concentrations determined spectroscopically at 2650-3000 nm120). A value of , 0.53, for the hydrogen bonding proton of HFAA was obtained. The potential energy diagram matching this is shown in Fig. 10. 

Potential energy diagram for the chemisorption of hydrogen on nickel. 

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