title: The photochemistry of 4,5-carbomethoxy-1,2,3-thiadiazole: direct observation of thiirene formation and its decay in solution.
abstract: The photochemistry of 4,5-carbomethoxy-1,2,3-thiadiazole in solution was studied at room temperature with use of UV-vis and IR transient absorption spectroscopies (λ(ex) = 266 nm). Ultrafast time-resolved techniques demonstrate that there is a very fast rise (<0.4 ps) of bis(carbomethoxy)thiirene in acetonitrile, and that it is the only intermediate formed. The lifetime of the thiirene is limited by dimerization to eventually form tetra(carbomethoxy)thiophene.
authors.affiliation: Quantum Electronics Laboratory, Faculty of Physics, Adam Mickiewicz University in Poznan, 85 Umultowska, Poznan 61-614, Poland. gotardb@amu.edu.pl
authors.forename: Gotard
authors.initials: G
authors.lastname: Burdzinski
authors.forename: Hoi Ling
authors.initials: HL
authors.lastname: Luk
authors.forename: Carolyn S
authors.initials: CS
authors.lastname: Reid
authors.forename: Yunlong
authors.initials: Y
authors.lastname: Zhang
authors.forename: Christopher M
authors.initials: CM
authors.lastname: Hadad
authors.forename: Matthew S
authors.initials: MS
authors.lastname: Platz
mesh_terms: D000097:Acetonitriles; D019281:Dimerization; D008027:Light; D015394:Molecular Structure; D055668:Photochemical Processes; D012996:Solutions; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013830:Thiadiazoles / Q000737:chemistry*; D013876:Thiophenes / Q000737:chemistry*
chemical_list: D000097:Acetonitriles; D012996:Solutions; D013830:Thiadiazoles; D013876:Thiophenes; C032159:acetonitrile