Spectroscopic and structural studies of some oxocarbon condensation products—I

The preparation of 22 mono- and 4 poly-condensation products of 5- and 6-membered ring oxocarbons and various o-phenylenediamines are reported. The products are characterized by their proton NMR spectra in various solvents and their vibrational mull spectra in the region from 3700 to 1300 cm−1.