Crystal and molecular structure of the solvate of 2,4,7-trinitro-9,9,10,10-tetrahydroxyphenanthrene with hexamethylphosphortriamide (I) and the solvate of 2,4,7-trinitro-10,10-dihydroxyphenanthren-9-one with dimethylformamide (II)

Two products of the addition reactions of H₂O at the carbonyl bonds of 2,4,7-trinitro-9,10-phenanthrenequinone, formed under mild conditions when it is dissolved in aqueous hexamethylphosphortriamide (HMPTA) and dimethylformamide (DMF), have been studied by x-ray diffraction. The crystalline solvates of 2,4,7-trinitro-9,9,10,10-tetrahydroxyphenanthrene (C₁₄H₉N₃O₁₀·3HMPTA) and 2,4,7-trinitro-10,10-dihydroxyphenanthren-9-one (C₁₄H₇N₃O₉·2DMF) are formed. In the first of these, all the molecules of the included solvent are disordered in complex fashion. Both crystal structures are stabilized by strong hydrogen bonds between the solvated and solvating molecules.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 3, pp. 575–580, March, 1990.