heterolytic bond-dissociation energy definition

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The energy required to break a given bond of some specific compound by heterolysis. For the dissociation of a neutral molecule AB in the gas phase into A+ and B- the heterolytic bond-dissociation energy D(A+B-) is the sum of the bond dissociation energy, D(A-B), and the adiabatic ionization energy of the radical A. minus the electron affinity of the radical B..