Nitrogen potential diagram, 501

Figures 7.4b and 7.4c show potential diagrams for phosphorus and nitrogen in aqueous solution with [H+]= lmoldm , ...

Fig. 14.6. Potential diagram for nitrogen at pH = 0. A Frost-Ebsworth diagram for nitrogen is given in Figure 7.4c.

FIGURE 6.4. Schematic potential diagram for the dissociative adsorption of nitrogen on a Fe(l 11) surface. 

If the coordinates of a nitrogen Frost diagram are available (see Exercise 8.3), these data can be used for rapid determination of this potential. The coordinates for HNO2 and N2H5 are (3, 4.36 V) and (—2, 0.46 V), respectively. The slope of the line connecting these points is... 

Figures 8.4b and 8.4c show potential diagrams for phosphorus and nitrogen in aqueous solution with [H ]= Imoldm , and these diagrams are the subject of worked example 8.8. We shall make more use of potential (Latimer) diagrams than Frost-Ebsworth diagrams in later chapters in this book, but the latter can readily be constructed from data...

Fig. 8. Schematic potential diagram for the progress of dissociative nitrogen adsorption based on experimental evidence for the indirect route.

Figure 8.6 (a) The structure and charge distribution of the ammonia molecule. The polarity of the N—H bonds occurs because nitrogen has a greater electronegativity than hydrogen, (b) The dipole moment of the ammonia molecule oriented In an electric field, (c) The electrostatic potential diagram for ammonia. 

FIGURE 4 Oxidation state-potential diagram for nitrogen (1.0MH+). 

Figure 7.19. (Left-hand side) Comparison between experimental sticking coefficients of N2 on Fe(l 11) and the prediction on the basis of Eq. (57) with an activation energy of 0.03 eV. (Right-hand side) Potential energy diagram for molecular nitrogen dissociating on Fe(l 11).

Figure 6.1 Schematic potential energy diagram for atomic and molecular nitrogen adsorption on a clean and K-covered Fe(100) surface. Curve (a) is for N2 + Fe(100) curve (b) is for N2 + Fe(100)-K. Note the lowering of the activation energy for dissociation from 3 kcalmol-1 to zero. (Reproduced from Ref. 3).

The continuous curve in the triangular voltage diagram (Fig. 25) is the initial curve, obtained under nitrogen with a previously unused sample of catalyst. Two anodic peaks occur in the potential range betwen 650 and 800 mV. The quantities of charge transferred in the peaks between 600 and 450 mV in the cathodic process are considerably smaller than those corresponding to the anodic peaks. 

A mathematical analysis of all four isomeric thiadiazoles by the simple molecular orbital method has provided molecular diagrams of the free base and conjugate acid of each thiadiazole, with electron densities, bond orders, and free valencies. On this basis, predictions have been made concerning the reactivities of the six non-equivalent carbon atoms, the basicities of the nitrogen atoms, and the delocalization energies in these molecules. The 5-position in free 1,2,4-thiadiazole should possess maximum reactivity in nucleophilic substitution reactions. The treatment also accounts for the order of the polarographic half-wave potentials and the position of the absorption maxima in the ultraviolet region of the spectra of 1,2,4- and 1,3,4-thiadiazoles.4... 

Figure 3.21 Potential energy diagram of DMABN as a function of the twist angle of the nitrogen lone pair orbital. In the planar conformation the states JLa and 1 Lb are the observable spectroscopic states these give rise to the states A (TICT) and B through 9(T internal rotation...

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