Zp. Xu et al., HE-I AND HE-II PHOTOELECTRON-SPECTRA OF 2(3H)-FURANONE AND 5-METHYL-2(3H)-FURANONE, Journal of electron spectroscopy and related phenomena, 94(1-2), 1998, pp. 1-5
The He I and He II photoelectron spectra of 2(3H)-furanone and 5-methy
l-2(3H)-furanone have been recorded. They show a third band not report
ed earlier. The first three bands in the spectrum of 2(3H)-furanone at
9.76, 10.65 and 12.83 eV are assigned to ionizations from the pi(C=C-
O-), n(O(C=O)), and.pi(-O-C=O)* orbitals, respectively. Correlation w
ith orbitals in ethene and acetic acid reveals significant pi-conjugat
ion in the furanones. (C) 1998 Elsevier Science B.V. All rights reserv
ed.