A dipole can align to stabilize or destabilize the formation or loss of a charge, thereby decreasing (if stabilized) or increasing (if destabilized) the activation barrier to a chemical event.[1] Field effects can therefore tune the acidity or basicity of bonds within their fields by donating or withdrawing charge density.[2] With respect to acidity, a common trend to note is that, inductively, an electron-withdrawing substituent in the vicinity of an acidic proton will lower the pKa (i.e. increase the acidity) and, correspondingly, an electron-donating substituent will raise the pKa.[7] The reorganization of charge due to field effects will have the same result.