The 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...
A 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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