The strongest nitrogen base is 1,8‐bis(dimethylamino)naphthalene‐2,7‐diolate according to experimental data and DFT calculations. Its proton affinity (PA) is comparable to those of simple ions such as OH−, NH2−, and H−. The diaminonaphthalene diolate 2 is protonated at the neutral amino groups with extremely high gas‐phase and solution proton affinity to form highly stable H‐bonded conjugate acid 1. DMSO=dimethyl sulfoxide.
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