Time-course experiments functional selectivity

In Chapter 6, we explained the concept of time invariances obtained in dual (or reciprocal) kinetic experiments. Such experiments can be performed in batch reactors or TAP reactors and start from special, reciprocal, initial conditions. This results in certain mixed quotientlike functions of selected nonsteady-state normalized concentrations from both experiments always being equal to the equilibrium coefficient of the reaction, during the whole course of the temporal experiment, that is, not only at the end, when equilibrium conditions are reached. Examples of such quotientlike functions are presented in Chapter 6. In this section, two new patterns will be presented, namely intersections and coincidences. 

The experimentalist interested in reaction dynamics dreams of the day when it will be possible to select all, or nearly all, of the initial parameters for potentially reactive collisions and, at the same time, observe the products scattered at particular angles as a function of their quantum states. (In this ideal experiment, the distribution of final relative velocities could be obtained through the equation of energy conservation, since the total energy will be defined and the distribution of final internal energies will be measured.) These experiments would yield detailed (or state-to-state) differential cross sections. Of course, the reaction dynamicists millenium, like most others, is some way off and, until such time as this dream is fulfilled, we only have the... 

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