H 3 has a natural charge of +0.184, the difference between hydrogen's nuclear charge (Z = +1) and the number of electrons on this atom (0.816). The charge on this atom is slightly less than those of the other two methyl hydrogens (+0.217 for each). The lower charge on H 3 stems, as shown later in the NBO output, from t he vicinal hyperconjugative interaction of the nitrogen lone pair with the CH antibond involving H 3.