title: On the structure of "5-nitrosotropolone".
abstract: It has long been discussed whether "5-nitrosotropolone" 1 takes the nitroso structure 1A or the tautomeric oxime structure 1B. Analysis of NMR and UV spectra data in this study indicates that the tropoquinone-5-monoxime 1B is preferred. The UV absorption shift to longer wavelength at dilute solutions is attributable to the dissociated form 3.
authors.affiliation: Research Foundation Itsuu Laboratory, 2-28-10 Tamagawa, Setagaya-ku, Tokyo 158-0094, Japan.
authors.forename: Ai
authors.initials: A
authors.lastname: Ito
authors.forename: Hideaki
authors.initials: H
authors.lastname: Muratake
authors.forename: Koichi
authors.initials: K
authors.lastname: Shudo