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For complete fragmentations of the type A m B n ...→ mA + nB + ... the change of the dipole polarizabilty Δα ≡ ∑ i ν i α i and its cube-root ΔαCR ≡ ∑ i ν i α i 1/3 as well as the atomization energy D at are calculated from literature data (ν i is the stoichiometric coefficient). We have taken into account a large number of molecules containing the atoms H, C, N, O, S, P, F, Cl, Br, and I as well as the metals Fe and Os. The ranges of D at and ∑ i ν i α i covered by the fragmentations are between 150 and 15 000 kJ mol-1 and −6 and 170 × 10-41 C2 m2 J-1, respectively. In most cases Δα > 0 is observed, whereas we always find Δα CR > 0. Additionally, we observe a linear relationship D at = A μ + B μ∑ i ν i α i μ between the atomization energy D at and the sum of the dipole-polarizabilities of all chemical species taking part in the fragmentation. The linear relation is obtained for μ = 1 and 1/3. Our observation implies that the most stable isomer has the lowest polarizability and that in chemical reactions the most stable species (reactants or products) have the lowest sum of α1/3.

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