Complexation energy, aniline-water complex

Upon ionization, the second type of complex in which ANI plays the role of hydrogen donor, becomes more stable and in fact the only complex found (Figure 42). Due to the difference between the ionization energies of water and ANI, the complex is formed from interaction of neutral water with ionized aniline. The resulting complexation energy amounts to A hb(ANI-H20+) = —72 kJmol-1, which represents a substantial stabilization of about 50 kJmol-1, with respect to the neutral complex formation. 

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