Fifteen amidrazone derivatives (six being new compounds) were synthesized and their proton magnetic resonance spectra were recorded in trifluoroacetic acid (TFA). The protonation shifts, related to alkyl groups and observed on comparison of the spectra run in a neutral solvent and TFA, were attributed to an amidinium-type resonance of the resulting cations in the acidic medium.
BAHÇECİ, ŞULE; YÜKSEK, HAYDAR; and İKİZLER, A. AYKUT (1999) "^1H NMR Spectra of Some Amidrazone Derivatives," Turkish Journal of Chemistry: Vol. 23: No. 3, Article 4. Available at: https://journals.tubitak.gov.tr/chem/vol23/iss3/4