217932.fig.003
Figure 3: Proton transfer degree from NQR measurements for complexes composed of chlorine containing proton donors plotted versus Δ 𝑝 𝐾 𝑁 : (1) CCl3COOH complexes ( 𝜉 = 0 . 1 2 ), (2) CHCl2COOH complexes ( 𝜉 = 0 . 4 2 ), and (3) C6Cl5OH complexes ( 𝜉 = 0 . 7 4 ) [20].