Chemistry of excited states. Part 13. Assignment of lowest π-ionizations in photoelectron spectra of thiophen, furan, and pyrrole
Abstract
An assignment of the lowest π-ionizations(1b1π) in thiophen, furan, and pyrrole at 12.5, 15.3, and 12.9 eV, respectively, is achieved by a comparison of observed HeII/HeI intensity changes in the corresponding photoelectron spectra with calculated intensity trends for different possible assignments.