Infrared absorption of 4,5-dihydroindeno[1,2-b]pyridines

Individual Infrared spectroscopic absorption bands in the double bond region have been assigned to specific, nonequivalent -ketoenamine structural fragments, i.e., to atomic groups in which the carbonyl is included in a cyclic oxoindenodihydropyridine system or to a ketoenamine group with a nonrigid carbonyl-containing substituent.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 629–632, May, 1989.