Infrared Spectra of Quinoline and its addition compounds with certain inorganic halides

Abstract

Infrared spectra of the adducts of quinoline with are reported and discussed. Assignments are given for the important bands.

An Aza-Diels–Alder Route to Polyquinolines

“…We in turn analyzed polyquinoline 4 with FTIR spectroscopy, comparing its spectrum to those obtained for model quinoline 2b and monomer 3 (Figure ). The spectrum of 4 revealed a cluster of peaks at 1500–1600 cm –1 , which could be attributed in part to its aromatic quinoline core. − This spectrum also featured broad peaks at 1616, 2216, and 3298 cm –1 that we tentatively assigned based on literature precedent to the polymer’s imine, alkyne CC, and alkyne CH terminal functionalities, respectively (Figure , blue trace). , These proposed assignments were corroborated by the spectrum of 3 , which featured peaks at 1626, 2146, and 3319 cm –1 , presumably corresponding to its imine, alkyne CC, and alkyne CH functionalities, respectively (Figure , red trace). , The assignments were further supported by the spectrum of 2b , which lacked the imine and alkyne peaks but did feature a cluster of peaks at 1500–1600 cm –1 , likely in part due to its quinoline core (Figure , black trace). − Together, our observations provided additional confirmation of the identity of 4 and indicated that some of the polymer’s imine and alkyne terminal groups (which were not readily detected with 1 H NMR) probably remained intact after the reaction and work-up.…”