Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
29334 | Journal of Photochemistry and Photobiology A: Chemistry | 2007 | 6 Pages |
Abstract
Photoreaction of 2-(methylamino)pyridine in a low-temperature argon matrix was investigated by infrared spectroscopy and density functional theory calculation. The two amino tautomers with nearly isoenergetic conformation (TA and CA) around the C–N(HCH3) bond for 2-(methylamino)pyridine change into N-2(1H)-pyridinylidenemethanamine as the methyl-imino tautomers (TMI and CMI) by intramolecular hydrogen-atom (or proton) transfer upon UV irradiation (320 > λ ≥ 300 nm). The reverse tautomerism occurs by longer-wavelength light irradiation (370 > λ ≥ 340 nm), where only the amino tautomer TA is reproduced from the methyl-imino tautomer TMI.
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Authors
Nobuyuki Akai, Keiichi Ohno, Misako Aida,