Photochemical dehydration of acetamide in a cryogenic matrix.
Vacuum ultraviolet (VUV) irradiation of acetamide has been monitored by Fourier transform infrared spectroscopy in argon matrix at 10 K. Several primary photoproducts, including HNCO ratio CH(4) and CO ratio CH(3)NH(2) molecular complexes, and acetimidic acid, which is reported for the first time, were characterized. The acetimidic acid identification was based on comparison between the experimental and theoretical (B3LYP) infrared spectra. Acetimidic acid is found in argon matrix in the (s-Z)-(E) and (s-Z)-(Z) configurations. It is also an intermediate in the VUV decomposition process, its dehydration leads to the formation of CH(3)CN ratio H(2)O molecular complex. The assignment of the complex was achieved by co-depositing the pairs of respective species and by ab initio calculation.
Duvernay
Fabrice
F
Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, USA.
Chatron-Michaud
Pascal
P
Borget
Fabien
F
Birney
David M
DM
Chiavassa
Thierry
T
D000081:Acetamides / Q000138:chemical synthesis / Q000737:chemistry* / Q000528:radiation effects; D001128:Argon / Q000737:chemistry*; D003080:Cold Temperature; D015394:Molecular Structure; D010777:Photochemistry; D012680:Sensitivity and Specificity; D017550:Spectroscopy, Fourier Transform Infrared; D013237:Stereoisomerism; D013499:Surface Properties; D014466:Ultraviolet Rays
D000081:Acetamides; D001128:Argon; C030686:acetamide