Energy diagrams describing

If the Lewis base ( Y ) had acted as a nucleophile and bonded to carbon the prod uct would have been a nonaromatic cyclohexadiene derivative Addition and substitution products arise by alternative reaction paths of a cyclohexadienyl cation Substitution occurs preferentially because there is a substantial driving force favoring rearomatization Figure 12 1 is a potential energy diagram describing the general mechanism of electrophilic aromatic substitution For electrophilic aromatic substitution reactions to... 

Figure 12.1 is a potential energy diagram describing the general mechanism of electrophilic aromatic substitution. For electrophilic aromatic substitution reactions to... 

Figure 1.13 Potential energy diagrams describing electron transfer processes according to Marcus theory. (A) Self-exchange (B) Cross Reaction.

The energy diagram describing NaCl dissociation is quite different to that observed for R—X and [R—X] dissociation. This is because for NaCl the two relevant configuration curves cross (Herzberg, 1950 Levine and Bernstein, 1974), in contrast to the situation for R—X and (R—X) where the two curves are separated. The well-known NaCl curve crossing is illustrated in Fig. 7. At infinite separation Na Cl is more stable than... 

Fig. 40a-g. Self-energy diagrams describing relaxation and correlation in the valence region of the model level structure in Fig. 39 (for further explanations see text)... 

Fig. 56 a-f. Self-energy diagrams describing the most important satellite excitations in the valence region of QH, (for further explanations, see text also cf. Fig. 40)... 

Fig. 63 a-i. Core hole self-energy diagrams describing relaxations in a transition-metal compound (see text)... 

Fig. 6 Simplified energy diagram describing the mechanism of the (a) PLS reaction of fac- Re ibpy)(COPR jJ 1 and (b) trans-cis isomerization of/ac-[Re (NN)(CO)3(L)] ...

Fig. 54 Potential energy diagram describing the energetics and kinetics at type II polymer heterojunctions. The energetic order of A D")r = oo and A D)r = oo may be reversed for PFB F8BT vs TFB F8BT. The inset shows the band offsets at a type II heterojunction. (Reprinted with permission from [57], 2004, American Physical Society)...

Fig. 2.45 Potential energy diagram describing the energetics and kinetics attype-ll polymer heterojunctions. The energetic...

Reaction coordinate The horizonuil coordinaic in a poieiiiial energy diagram, describing the progress of a reaction,... 

Figure 3.40 Pictorial illustration (energy diagram) describing the neutralization of a positive ion on departing a condncting or semiconducting surface as surmised by the electron tunneling model. Note The direction of electron transfer, as represented by the large arrow, is defined primarily by the positions of the Fermi edge (Ep) and the ionization level at a distance at which the interaction occnrs (zj- The probability, on the other hand, is defined by the width of the ionization level (2A) at as well as the emission velocity normal to the snrface (Vj ).

Figure 15-20 Potential-energy diagram describing the course of the reaction of benzene with an electrophile. The first transition state is rate determining. Proton loss is relatively fast. The overall rate of the reaction is controlled by EaJ the amount of exothermic energy released is given by AH°.

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