organic compounds
Open access
Molecules of the potential non-linear optical title compound, C13H9N3O3, form dimeric stacks of molecules along the a axis cross-linked around inversion centers by N—HO hydrogen bonds and weak (phenyl)C—HO intermolecular interactions, forming a `collaboration' of R22(8) and R22(16) ring motifs. The molecules are then further linked by weak C—HO and C—HN interactions into sheets parallel to (121).
organic compounds
Open access
The title compound, C21H13N3O, crystallizes with two independent molecules with similar conformations per asymmetric unit. The dihydrofuran rings are essentially planar with maximum deviations of 0.017 (1) and 0.006 (1) Å for the O atoms. The dihedral angles between the dihydrofuran ring and the attached phenyl rings are 79.90 (6) and 82.07 (6)° in one molecule and 79.36 (6) and 72.26 (6)° in the other. In the crystal, the molecules are linked by weak C—Hπ and C—HN interactions similar to those in other closely related crystals. The replacement of appended methyl by phenyl groups has not significantly affected the dihydrofuran ring structure or the crystal packing interactions.
organic compounds
Open access
The title compound, C20H21N3O, has crystallographic mirror symmetry with all non-H atoms apart from the methyl C atom of the CMe2 group lying on the mirror plane. Molecules are linked into planar sheets parallel to (010) by phenyl–azo C—HN and phenyl–ethanone C—HO interactions. Methyl C—Hπ interactions provide crosslinking between the planes.