n,π-Conjugation in N-methylvinylamine. A photoelectron spectroscopic study

Abstract

The unstable species N-methylvinylamine was prepared by the thermal decomposition of gaseous 2-methylaziridine in a flow system and its UV photoelectron spectrum was recorded. The first two bands were observed at 8.00 and 11.00 eV. The methyl substituent shows the effect of reducing the degree of conjugation between the n_N and π_CC orbitals, as revealed by a comparison with the spectrum of the parent compound vinylamine.