Infrared spectra of the novel Sn2H2 species and the reactive SnH1,2,3 and PbH1,2,3 intermediates in solid neon, deuterium, and argon

Laser-ablated Sn atoms and H-2 molecules in excess neon and argon react during condensation to produce SnH1,2,3,4 as identified from infrared spectra with D-2 and HD substitution, and from agreement with frequencies calculated by density functional theory. The novel ditin species Sn2H2, is also formed in further reactions. The PbH1,2,3 intermediates are produced in analogous experiments. All four tin deuterides and the first three lead deuterides are observed in pure deuterium. Evidence is presented for the photosensitive MH3- and MH2- anions formed through electron capture processes.