P.M.R. spectra of heteroaromatic molecules containing bridgehead nitrogen atoms. IV. Pyrrolo[1,2-a]quinoxaline

Abstract

The complex eight-proton p.m.r, spectra of pyrrolo[l,2-a]quinoxaline in (CD₃)₂SO and CDC1₃ solutions were fully analysed. Evidence for non-zero inter-ring coupling constants was obtained by detailed comparison of the experimental and theoretically simulated spectra. Approximate chemical shifts for pyrrolo[l,2-alquinoxaline in CCl₄, (CH₃),C0, CH₃COOH, CF₃COOH and C₆D₆ were also obtained.