Global Scenario for Chemical Reactivity

TABLE 3.38 Synopsis of the Basic Principles of Reactivity Towards Chemical Equilibrium With Environment in Terms of Electronegativity, Chemical Action, and Chemical Hardness (Putz, 2008b, 2011a) 

Aj = 0 Minimum (residual) electronegativity. the constancy of the chemical potential is perturbed by the electrons of bonds bringing about a finite difference in regional chemical potential even after chemical equiUbrium is attained globally (Tachibana et al., 1999). 

At] = 0 Hard-and-soft acids and bases. hard likes hard and soft likes soft (Pearson, 1973,1990, 1997). 

At] = 0 Maximum (residual) hardness. molecules arranges themselves as to be as hard as possible (Pearson, 1985,1997) 

One may see therefore that there are basically three variational principles, i.e., for electronegativity, chemical action and chemical hardness that assure the optimum of charge-potential, density-potential, and density-charge relationships, respectively, while the quantum fluetuations are resolved by the residual minimum electronegativity and by residual maximum chemical hardness principles. 

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