State correlation diagram chemiluminescence

Figure 14.11. (a) Orbital and (b) state correlation diagrams for the decomposition of dioxetane. The observed chemiluminescence may be due to intersystem crossing (ISC) to the triplet manifold in the region denoted by the shaded circle in (b). 

Figure 7.56. Schematic state correlation diagram a) for a singlet photoreaction and b) for a singlet chemiluminescent process.

Figure 7.57. State correlation diagram for the chemiluminescence reaction of tetramethyl-1,2-dioxetane (by permission from Turro, 1978).

Figure 7.58. Schematic state correlation diagram for the chemiluminescence of a strongly exothermic reaction forbidden in the ground state (adapted from Michl, 1977).

In some cases when detailed ab initio calculations of potential surfaces have become available, they have confirmed the major qualitative features of the surfaces deduced from experimental data and from preliminary data on correlation diagrams and the asymptotic properties of reactant, product, and intermediate states. One such case is the C+-H2 system,451 which has aroused considerable interst. Angular and energy distributions were determined experimentally for the CH+ + H products from the reactions of the C+(2P) ground state and the C+(4P) excited state with H2 (Table I, Jones et al.9b and references cited therein, and Jones et al.326). Chemiluminescence was also observed from this hydrogen-atom transfer reaction (Table IV).442,443 In addition, the reaction... 

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