Interplay between dihydrogen and alkali-halogen bonds: Is there some covalency upon complexation of ternary systems?

► Dihydrogen bonds and alkali-halogen bonds identified on binary and ternary systems. ► The strongest interactions are measured and red-shifts on proton donors are detected. ► These effects are justified through the p-character on the proton donating bonds. ► The covalent character is then estimated by the QTAIM topology.