1H and 13C NMR, as well as UV and IR, spectra of a new class of bipyridinium salts made by double quaternization of trans−1, 2-bis(4-pyridyl) ethene unit with n-alkyl salts are reported. The effect of quaternization on the 1 and 13C NMR spectra of the salts is discussed.
Kamounah, F. S., Yousif, Y. Z., Ali, M. K., & Al-rawi, J. M. A. (1990). Proton and carbon-13 NMR study of a new class of bipyridinium liquid crystals. Spectroscopy Letters, 23(7), 811-820. . https://doi.org/10.1080/00387019008054460