Abstract The HeI and HeII ultraviolet photoelectron spectra of PhΦNH, PhNHSiMe 3, PhΦNSiMe 3,(PhΦN) 2 SiMe 2, Ph 2 NSiMe 2 Φ, Ph 2 NSiPH 3 and Ph 2 NSiΦ 3 (Me= CH 3; Ph= C 6 H 5; Φ= C 6 F 5) are reported. Tentative assignment is given for the low-IE (ionization energy) region. HeI and HeII relative band intensities have been obtained from these spectra and also from the spectra of PhBr, ΦBr, PhNH 2 ΦNH 2, Ph 2 NH and Ph 2 ...
