Spectroscopic Characterization of (Z)-N-(2-Amino-1,2-Dicyanovinyl) Formimidate via Raman Technique

Abstract

This study employs Raman spectroscopy for the first time to characterize (Z)-N-(2-amino-1,2-dicyanovinyl) formimidate. Raman, in addition to IR and NMR (acquired and literature), helps confirm the molecular structure of the compound. Additionally, the melting point (mp 132˚C - 134˚C) data helps confirm the compound’s purity. Raman spectra, measured with a 785 nm laser, reveal key vibrational modes, including two peaks at 2242 and 2206 cm − 1 (C≡N stretches), two peaks at 1634 and 1591 cm − 1 (C=N and C=C stretches), two peaks at 1369 and 1224 cm − 1 attributed to (C-O and N-H bands). The acquired FT-IR spectra showed characteristic peaks at 3416, 3304, 2243, 2208, 1635, 1606 cm − 1 as reported by IR data of Alves et al (1990) and US Patent #US 8,518,901 B2 (2013) at 3309 cm − 1 (NH/NH 2 stretches), 2247 cm − 1 (C≡N stretches), 2207 cm − 1 (CN stretches)~1636 cm − 1 (C=N stretches), 1608, 1256 (C-0 str.), 810 cm − 1 supporting the presence of cyano, formimidate, and amino groups. These findings validated the compound’s identity and highlighted the complementary nature of Raman and IR techniques for formimidate analysis.