Energy term diagrams

The energy term diagrams, i.e., energies of multi-electron states vs. parameter G4 both in units of Racah parameter B, obtained for d°+ (d°) ions in D31, sites... 

Fig. 24. Energy term diagrams for d + (d ) ions in a Djij ligand field with the parameters p=90°, 02/64=10, C/B=4. Reprinted with permission from [56], Copyright 1977 American Chemical Society...

Fig. 6.3 The energy term diagram in a different representation. The 0 at the upper edge denotes the vacuum level, i.e. the threshold at which the molecule or the crystal Is just positively ionised by sufficient excitation of an electron. Here, Ig = the ionisation potential of the molecule, Ag = the electron affinity of the molecule, Ac = the electron affinity of the...

In a cubic field three spin-allowed transitions are expected because of the splitting of the free-ion, ground term and the presence of the term. In an octahedral field the splitting is the same as for the octahedral d ion and the same energy level diagram (p. 1029) can be used to interpret the spectra as was used for octahedral Cr Spectra of octahedral Ni usually do consist of three bands which are accordingly assigned as ... 

Fig. 2. Components of Li enthalpies of complexation with methylamines. Successive steps indicate the effect on energy of interaction between Li and the amine of inclusion of additional components of the binding energy. The diagram shows that the permanent dipoles on amines (the charge on the nitrogen of the isolated amine) favor ammonia over trimethylamine complexation, but that polarizability and inductive effects (shift of negative charge onto the nitrogen in the complex) cause a massive turnaround in favor of complexation with trimethylamine rather than ammonia. Of particular importance is the near inversion of order caused by the addition of repulsive van der Waals terms. Modified after Ref. (9).

Figure 9.24 Energy-level diagram for a luminescent species, in which a metastable state slows the rate of emission. The metastable state is also termed an ion trap...

Fia. 24. Energy level diagram for 3d configuraUon quartet terms under the action of crystal fields of various symmetries. Orbital degeneracy of a state is indicated in parentheses. 

As an example of a system to which Equation (31) applies, consider the energy level diagram of a single cl-electron given in Fig. 23. Here S = so matrix elements of <8, — IS(S - -1) equal zero. There is no I) term in... 

In this case the energy level diagram is that of Fig. 25. The gi-factors are greater than 2.002 since X is negative corresponding to a 3d hole configuration. One must add a term... 

Figure 9.1. Energy level diagram for hydrogen molecule, H2, and separated atoms H R = 00) and He R = 0). R = the Rydberg constant = 13.6057 eV = 0.5 a.u. (atomic unit of energy). Value from ionization potential of He (Is 2p P). Value from ionization potential of H2. The experimental ionization potentials are quite precise but for systems containing more than one electron their interpretation in terms of orbital energies is an approximation.

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).]... 

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