Saturated 5-Membered Ring Conformations 2 - 1H NMR Study of Protonated N-Methylpyrrolidines

Article abstract of DOI:10.1002/mrc.1270160205

The 1H NMR spectra of the protonated and unprotonated forms of cis- and trans-N-methylhexahydroisoindoline, of 1,3,3,4,4-pentamethylpyrrolidine and of 1,3,3-trimethylpyrrolidine were analyzed.The coupling constants between the NH⁺ and the CH protons α to the nitrogen allowed the study of the conformation of the cyclic systems in pseudorotation.