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Thermal and Photoinduced Control of Relative Populations of 4-Methoxybenzaldehy...
Kus, Nihal; Sharma, Archna; Reva, Igor; Lapinski, Leszek; Fausto, RuiTwo almost isoenergetic conformers of 4-methoxybenzaldehyde (p-anisaldehyde), O-trans and O-cis, are nearly equally populated in gas phase at room temperature. The existence of these two conformers of similar energy makes p-anisaldehyde an attractive molecule for conformational investigations, in which the relative populations of the two forms might be subjected to optical control. In the present study, monomer...
Photochemistry of six- and five-membered-ring alpha,beta-unsaturated lactones i...
Fausto, Rui; Breda, Susana; Kus, NihalThe photochemistry of representative six and five-membered alpha,beta-unsaturated lactones [alpha-pyrone and some of its derivatives, including coumarin and 3-acetamidocoumarin, 2(5H)-furanone] isolated in cryogenic inert matrices has been investigated by infrared spectroscopy and quantum chemical calculations. In these types of molecules, two main competitive photochemical reaction pathways could be identified...
FTIR Spectroscopic and Theoretical Study of the Photochemistry of Matrix-Isolat...
Kus, Nihal; Breda, Susana; Reva, Igor; Tasal, Erol; Ogretir, Cemil; Fausto, RuiThe infrared spectrum of monomeric unsubstituted coumarin (C<sub>9</sub>H<sub>6</sub>O<sub>2</sub>; 2 H-1-benzopyran-2-one), isolated in solid argon at 10 K is presented and assigned. The UV-induced ( λ > 200 nm) unimolecular photochemistry of the matrix-isolated compound was studied experimentally. Three main photoreactions were observed: (a) decarboxylation of the compound and formation of benzocyclobutadiene...
FTIR Spectroscopic and Theoretical Study of the Photochemistry of Matrix-isolat...
Kus, Nihal; Breda, Susana; Reva, Igor; Tasal, Erol; Ogretir, Cemil; Fausto, RuiA correction to the article "FTIR Spectroscopic and Theoretical Study of the Photochemistry of Matrix-isolated Coumarin" that was published in the previous issue is presented..
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