Check out our most recently article with the Dantus group, investigating the formation of H3+ by H2 roaming in thiols, for comparison with our past work in alcohols. Though easier to ionize, H3+ yields in thiols are actually lower than in equivalent alcohols. Electronic structure calculations carried out by recently-graduated Dantus group member and friend of the group Muath Nairat provide an interesting explanation.
Also, congrats to Muath, who is starting a postdoc in the Schlau-Cohen group at MIT!