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We present two iridium complexes  1H    +   and  2H    +   that contain cationic ligands to extend the knowledge of charge-assisted hydrogen bonding (CAHB), which counts among the strongest non-covalent bonding interactions. Upon protonation, both complexes were converted into new hydrogen-bonding arrays with various selectivity for respective H-bonding partners. This study compares the association strengths of four hydrogen-bonding co-systems, emphasizing the roles of CAHB in supramolecular systems. We determined that the cationic charge in these systems contributed up to 2.7 kJ mol −1  in the H-bonding complexation processes.

Elucidation of Charge Contribution in Iridium-Chelated Hydrogen-Bonding Systems