In the title mol-ecule, C(19)H(14)ClN(3)O, the quinoline and quinazoline ring systems form a dihedral angle of 80.75 (4)°. In the crystal, the mol-ecules are linked by pairs of C-H⋯N hydrogen bonds into centrosymmetric dimers, generating R(2) (2)(6) ring motifs. The structure is further stabilized by C-H⋯π inter-actions and π-π stacking inter-actions [centroid-centroid distances = 3.7869 (8) an...

In the title compound, C(9)H(8)BrNO, the non-H-atom framework is essentially planar, with a maximum deviation of 0.087 (3) Å. In the crystal, mol-ecules are inter-connected into a three-dimensional network by C-H⋯O and N-H⋯O hydrogen bonds. In addition, C-H⋯π inter-actions and a π-π stacking inter-action, with a centroid-centroid distance of 3.5535 (19) Å, are also observed.

In the title compound, C(24)H(18)O(3), the dihedral angles between the mean planes of the five-membered furan ring and the meth-oxy-substituted benzene and the adjacent and outer biphenyl benzene rings are 2.43 (7), 4.48 (7) and 30.47 (8)°, respectively. The crystal packing is stabilized by weak C-H⋯O and C-H⋯π inter-molecular hydrogen bonds and π-π stacking inter-actions [centroid-centroid dis...

In the title compound, C22H14S, the r.m.s. deviation from the mean plane of the four-fused-ring naphtho-thio-phene unit is 0.056 Å. The dihedral angle between the naphtho-thio-phene plane and the pendant phenyl ring is 67.24 (6)°. In the crystal, weak C-H⋯π and π-π stacking [minimum centroid-centroid separation = 3.7466 (10) Å] inter-actions are observed, which together lead to (010) sheets.

A new three-dimensional (3D) supramolecular framework, [Ag2(bipy)2(bdc)·4H2O]n 1, has been synthesized by the ultrasonic reaction of Ag2O, bipy and H2bdc (H2bdc = 1,4-benzenedicarboxylic acid; bipy = 4,4′-bipyridine) at room temperature. It exhibits a new 3D supramolecular framework which is built from cationic Ag-bipy chains and anionic bdc-H2O sheets through hydrogen bonds, π · · ·π stacking ...

The asymmetric unit of the title structure, 2C(4)H(7)N(2) (+)·C(6)Cl(2)O(4) (2-), consists of one 2-methyl-imidazolium cation and one-half of a chloranilate anion, the formula unit being generated by crystallographic inversion symmetry. N-H⋯O hydrogen bonds link the ions into a two-dimensional framework parallel to the (102) plane. No π-π stacking or C-H⋯π inter-actions are observed in the crys...

Extensive π-stacking interactions in a crystalline mononuclear Dy complex give rise to phase-sensitive color-tuneable emission and pure white light generation allow for intense NIR by photoexcitation over broad spectral range.

In the title compound, C14H16O4S2, the thieno[2,3-b]thio-phene ring systems are planar [maximum deviation = 0.008 (2) Å]. The mol-ecular conformation is stabilized by intra-molecular C-H⋯O hydrogen bonds, while the crystal packing is stabilized by C-H⋯O, C-H⋯π and π-π stacking [centroid-centroid distance = 3.6605 (14) Å] inter-actions, which lead to supra-molecular layers in the ab plane.

The crystal structures of three isomeric (E)-N-methyl-N'-(nitro-benzyl-idene)-2-(thio-phen-2-yl)acetohydrazides (formula C14H13N3O3S) are described, with the nitro group in ortho, meta and para positions in the benzene ring. In each crystal structure, mol-ecules are linked by various weak inter-actions (C-H⋯O and C-H⋯π bonds, and π-π stacking), leading to three-dimensional networks in each case...

In the title compound, C19H16BrClO4, both the fused xanthene rings and one of the cyclo-hexane rings adopt envelope conformations, while the other cyclo-hexane ring is in a chair conformation. In the crystal, mol-ecules are linked by C-H⋯O hydrogen bonds, forming infinite chains running along [10-1] incorporating R 2 (2)(16) ring motifs. In addition, C-H⋯π inter-actions and weak π-π stacking in...