Photodissociation of Thiirane in a Molecular Beam at 193 nm

Article abstract of DOI:10.1021/j100190a064

A comprehensive study on the 193-nm photodissociation of thiirane has been carried out using the time-of-flight crossed laser-molecular beam technique.Following excitation of the transition with 4p <- n Rydberg character at 192.2 nm, the dominant primary decay ( ca. = 80percent) was found to be hydrogen abstraction yielding the fragments H + SC2H3.In competition with this decay are two about equally efficient (ca. = 10percent each) primary dissociation processes which form S + C2H4 and HS + C2H3, respectively.Furthermore, the same 15-ns photolysis which induces the three primary processes also gives rise to three secondary dissociation reactions identified as SC2H3 -> S + C2H3, C2H3 -> H + C2H2 and HS -> H + S