“…1 and 2). Besides, the O( 3 P) + H 2 + system is related to other interesting ionic systems as, e.g., the X( 1 S) + H 2 + -XH + + H (X = He, Ne, Ar) 3,4 and O + ( 4 S) + H 2 + -OH + + H 5,6 reactions, from which a lot has been learned from the reaction dynamics perspective. Furthermore, although the H 2 O molecule and the related ionic species (O + , OH + , H 2 O + , H 3 O + , etc.)…”