Two nitrates of dapsone: New candidates for non-linear optical materials

Physico-chemical study of new supramolecular-architectured hybrid organic–inorganic sulfates incorporating diammoniumdiphenylsulfone cations

“…Thus, the values of the given parameter in 4,4′-DDS-S are 107.84(17) for cation A and 107.61(17)° for B; whereas for 3,3′-DDS-S slightly lower values of the above angle are found (100.28(18) and 103.22(19)° for cations A and B, respectively. By comparing the values of the above-mentioned parameters for both investigated compounds with those from other multi-component systems containing the 4,4′-diamine diphenyl and the 3,3′-diamine diphenyl sulfone moieties 40 ( Table 1 ), it can be seen that the cationic moieties within these compounds are characterized by the considerable variability of their internal geometry. A possible explanation for this feature might be the different surroundings of these moieties in their crystals and the participation of their structural fragments in different schemes of intermolecular interactions.…”

“…4,4 0 -DDS-S 5.218(2)/5.229(2) 120.73(12)/122.24(13) 107.84(17)/107.16(17) 3,3 0 -DDS-S 4.595(2)/4.841(2) 91.18(14)/98.64(14) 100.28(18)/103.22(19) 4,4 0 -Sulfonyldianilinium dinitrate40 4.890(2) 100.86(7) 103.44(9) 3,3 0 -Sulfonyldianilinium bis(dihydrogen phosphate) phosphoric acid solvate29 5.052(2) 108.92(6) 105.02(7) …”

Investigating the Solubilities of the Nitrate and Isomorphous Bromide and Chloride Salts of Dapsone

“…22 Unfortunately, during the course of our experiments, the single-crystal X-ray structure of the nitrate salt was published. 23 Even so, we decided to keep the nitrate salt for comparative purposes, and here we also report, for the first time, the crystal structure of DDS bromide and DDS chloride forms. The DDS salts were completely characterized using Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and powder X-ray diffraction (PXRD) techniques.…”

“…We chose three acids (HCl, HBr, and HNO 3 ) belonging to the GRAS (generally recognized as safe) category in order to incorporate these features, and also to synthesize pharmaceutically acceptable crystalline salts . Unfortunately, during the course of our experiments, the single-crystal X-ray structure of the nitrate salt was published . Even so, we decided to keep the nitrate salt for comparative purposes, and here we also report, for the first time, the crystal structure of DDS bromide and DDS chloride forms.…”