3-tert-Butyl-1-(4-chloro­phenyl)-7,7-dimethyl-5,6,7,8-tetrahydro­pyrazolo[3,4-b]quinolin-5-one: centrosymmetric dimers generated by C—H...π(arene) hydrogen bonds

Molecules of the title compound, C₂₂H₂₄ClN₃O, are linked by two pairs of C—H...π(arene) hydrogen bonds into centrosymmetric dimers.

5-Chloro-3-methyl-1-phenyl-1H-pyrazole-4-carb­aldehyde: sheets built from C—H...O and C—H...π(arene) hydrogen bonds

Molecules of the title compound, C₁₁H₉ClN₂O, are linked into sheets by a combination of one C—H...O hydrogen bond and one C—H...π(arene) hydrogen bond.

11-(4-Chloro­phenyl)-10-methyl-8-phenyl-6,8-di­hydro-5H-benzo­[f]­pyrazolo­[3,4-b]­quinoline

Molecules of the title compound, C₂₇H₂₀ClN₃, are linked by two independent C—H...π(arene) hydrogen bonds into chains of edge-fused rings.

The α polymorph of racemic tris­(2,4-penta­nedionato-κ²O,O′)vanadium(III), redetermined at 120 K

In the α polymorph of the title compound, [V(C₅H₇O₂)₃], the mol­ecules lie in general positions with no crystallographically imposed symmetry, but with approximate D₃ (32) mol­ecular symmetry.

(1R,2R)-N,N'-Bis(4-nitro­phenyl­methyl­ene)­cyclo­hexane-1,2-di­amine

The title compound, C₂₀H₂₀N₄O₄, crystallizes with two molecules in the asymmetric unit. Each independent mol­ecule exhibits approximate twofold rotation symmetry, but conformational differences between the mol­ecules preclude any higher symmetry.

11-(4-Bromo­phenyl)-10-methyl-8-phenyl-6,8-di­hydro-5H-benzo­[f]­pyrazolo­[3,4-b]­quinoline

The title compound, C₂₇H₂₀BrN₃, is isostructural with the chloro analogue: the mol­ecules are linked by two independent C—H...π(arene) hydrogen bonds into chains of edge-fused rings.

3-(5-Chloro-3-meth­yl-1-phenyl­pyrazol-4-yl)-1,5-di-2-thienylpenta­ne-1,5-dione: centrosymmetric dimers formed by C—H...π(thio­phene) hydrogen bonds

Mol­ecules of the title compound, C₂₃H₁₉ClN₂O₂S₂, are linked into cyclic centrosymmetric dimers by paired C—H...π(thiophene) hydrogen bonds.

Saccharin, redetermined at 120 K: a three-dimensional hydrogen-bonded framework

Mol­ecules of the title compound, C₇H₅NO₃S, are linked by paired N—H...O=C hydrogen bonds into R₂²(8) dimers and these dimers are linked into a three-dimensional framework structure by a combination of three independent C—H...O hydrogen bonds.

Racemic cis-bis­(2,2′-bipyrid­yl)difluoro­vanadium(III) tetra­fluoro­borate

The title compound is a salt, [V(C₁₀H₈N₂)₂F₂]BF₄, in which pairs of cations, one each of Λ and Δ configuration, are linked by a centrosymmetric π–π stacking inter­action.

2-Nitro­benzaldehyde 2-iodo­benzoyl­hydrazone

Mol­ecules of the title compound, C₁₄H₁₀IN₃O₃, are linked into sheets by a combination of N—H...O and C—H...O hydrogen bonds.

3-tert-But­yl-4-(4-nitro­phen­yl)-1-phen­yl-1H-pyrazolo[3,4-b]pyridine

Mol­ecules of the title compound, C₂₂H₂₀N₄O₂, are linked by paired C—H...O hydrogen bonds into centrosymmetric R₂²(18) dimers and these dimers are linked into chains by paired C—H...π(arene) hydrogen bonds.

1-(4-Methyl­phenyl­sulfon­yl)-1H-1,2,3-benzotriazole: sheets built from C—H...N, C—H...O and C—H...π(arene) hydrogen bonds

The mol­ecules of the title compound, C₁₃H₁₁N₃O₂S, are linked into chains of edge-fused rings by a combination of C—H...N and C—H...O hydrogen bonds, and these chains are linked into sheets by a combination of a C—H...π(arene) hydrogen bond and a second, rather weak, C—H...O hydrogen bond.

4-Nitro­phenyl 2-iodo­benzoate: sheets built from C—H...O hydrogen bonds and two-centre iodo–nitro inter­actions

Mol­ecules of the title compound, C₁₃H₈INO₄, are linked into complex sheets by two C—H...O hydrogen bonds and one two-centre iodo–nitro inter­action.

Sheets of π-stacked centrosymmetric mol­ecules in N,N′-bis­(3-nitro­benzyl­idene)octane-1,8-diamine

In mol­ecules of the title compound, C₂₂H₂₆N₄O₄, which lie across centres of inversion, the central octane fragment adopts a nearly planar all-trans conformation. There are no hydrogen bonds in the crystal structure but the mol­ecules are linked into sheets by a single π–π stacking inter­action.

(E)-3-(4-Chloro­phen­yl)-2-(2-thien­yl)acrylonitrile: chains built from C—H...N hydrogen bonds

In the title compound, C₁₃H₈ClNS, the thio­phene ring is disordered over two orientations. The mol­ecules are linked into C(5) chains by a single C—H...N hydrogen bond.

A hydrogen-bonded chain of rings in (E)-3-(4-nitro­phenyl­amino­carbon­yl)prop-2-enoic acid

In the title compound, C₁₀H₈N₂O₅, the mol­ecules are linked into chains of rings by the concerted action of one N—H...O and one C—H...O hydrogen bond.

3-Methyl-4-(4-nitro­phen­yl)-1-phenyl-1,7-dihydro-6H-pyrazolo[3,4-b]thia­zolo[5,4-e]pyridine-6-thione–dimethyl­formamide (1/1)

The title compound is a stoichiometric solvate, C₂₀H₁₃N₅O₂S₂·C₃H₇NO, in which the two components are linked by an N—H...O hydrogen bond. The heterocyclic mol­ecules are linked into chains by a combination of a C—H...S=C hydrogen bond and a π–π stacking inter­action.