Low-energy electron scattering from pyrimidine: Similarities and differences with benzene

Abstract: Differential cross sections for low-energy electron-impact excitation of the unresolved combinations of 23B2 +21A1 and 31A1 +21B2 electronic states of pyrimidine are reported. Comparisons are made with recent differential cross section measurements for the electron-impact excitation of the 1E1u and unresolved 1B1u + 3E2g electronic states of benzene [H. Kato, M. Hoshino, H. Tanaka, P. Limão-Vieira, O. Ingolfsson, L. Campbell, M.J. Brunger, J. Chem. Phys. 134 (2011) 134308.], in order to evaluate the nature of electron impact π–π∗ transitions in aromatic species. [Copyright &y& Elsevier]