Using these orientational features, we analyzed the F-SAPT energetics of all 1706 carbon atoms capable of forming a CH-p interaction. These include carbon atoms within the distance cutoff of 4.6 Å for which the covalently-bound hydrogen atom is closer to the aromatic ring than the covalently-bound oxygen atom (i.e., carbon atoms C1, C3, C4, C5, and C6). However, all galactose CH-p donors are also polarized by a neighboring oxygen atom. Depending on glycan stereochemistry, some of these will engage in hyperconjugative interactions with neighboring hydroxyl groups. Thus, for each potential CH group (Cn), we evaluated the energetic contributions from three functional group sets: Cn, containing the carbon atom only; On, containing the bound oxygen atom only; and Cn + On, containing the two together (Figure ). endocyclic galactose carbon atoms in the pyranose ring for which the attached hydrogen is closer to the aromatic ring than the attached hydroxyl and (bottom row) exocyclic galactose carbon atom 6, which is outside of the pyranose ring. Columns are separated by the F-SAPT "functional groups" included in the energy contribution reported: (left) the sum of the contributions from the carbon atom's group and its attached oxygen atom's group, (center) the carbon atom's group, and (right) the oxygen atom's group. The F-SAPT contribution is shown according to the color scale at the far right. Molecule insets show example functional groups included for each plot, with atoms included in the functional group shown in a sphere representation with saturated coloring. Atoms are colored as follows: carbon in gray, oxygen in red, and hydrogen in white.