From helping catalyze interstellar reactions and fueling the birth of stars to its presence in neighborhood gas giants like Saturn and Jupiter, trihydrogen, or H3+, is best known as the “the molecule that made the universe.” 

While we have a clear picture of how the majority of H3+is formed — a hydrogen molecule, or H2, colliding with its ionized counterpart, H2+ — scientists are keen to understand alternative sources of H3+ and to better measure its abundance throughout the cosmos. 

Now, in a new paper appearing in Nature Communications, Michigan State researchers Piotr Piecuch and Marcos Dantus and their groups and collaborators have provided unprecedented insights into the formation of H3+ in compounds known as methyl halogens and pseudohalogens.