Rv. Linko et al., Synthesis and physicochemical properties of 9,10-phenanthrenequinone monoxime and its nitro derivatives, RUSS CHEM B, 48(6), 1999, pp. 1095-1099
Phenanthrenequinone monoxime and its mono-, di-, and trinitro derivatives w
ere synthesized. The acidity constants and their variation with the number
and position of nitro groups were determined. The electronic and IR spectra
of the nitro compounds were studied. The bands in the electronic spectra w
ere assigned based on quantum-chemical calculations in the Pariser-Parr-Pop
le approximation. Correlations between the pK(a), values and some calculate
d characteristics of the compounds under study were found.