organic compounds
The title compound, C20H14O2S, has been obtained in two monoclinic forms, which differ in their unit-cell dimensions, compactness of packing and conformation. Pairwise association of molecules occurs via complementary O—HO hydrogen bonding.
organic compounds
In both title structures, C40H32N4Si and C40H32N4Si·3C4H8O, the angles around the Si atom deviate significantly from the tetrahedral value [104.34 (7)-116.63 (7)° in the nonsolvate and 99.91 (15)-116.85 (15)° in the solvate]. The amino H atoms in the solvated structure are involved in hydrogen bonding with two of the tetrahydrofuran solvent molecules.