1-(2-Hy­droxy-3,5-dimeth­oxy­phen­yl)ethanone

In title compound, C₁₀H₁₂O₄, all of the non-H atoms lie approximately in a plane with the largest deviation being 0.061 (2) Å. An intra­molecular O—H...O hydrogen bond generates an S(6) ring motif. No classical inter­molecular hydrogen bonding occurs, with only van der Waals forces stabilizing the crystal structure.

2-(4-Chloro-1H-indol-3-yl)acetonitrile

The title compound, C₁₀H₇ClN₂, contains two approximately planar mol­ecules, A and B (r.m.s. deviations = 0.039 and 0.064 Å, respectively) in the asymmetric unit. In the crystal, N—H...N hydrogen bonds link the mol­ecules into C(7) chains of alternating A and B mol­ecules propagating along the a-axis direction. The crystal used for the data collection was found to be a racemic twin.

Bis[4-amino-N-(pyrimidin-2-yl)benzene­sulfonamidato](1,10-phenanthroline)nickel(II)

In the mononuclear title compound, [Ni(C₁₀H₉N₄O₂S)₂(C₁₂H₈N₂)], the Ni^II atom has a distorted octa­hedral coordination geometry comprising four N atoms from two 4-amino-N-(pyrimidin-2-yl)benzene­sulfonamidate ligands and two N atoms from a 1,10-phenanthroline ligand. In the crystal, mol­ecules are connected into a three-dimensional supra­molecular network via N—H...O hydrogen bonds and weak C—H...O and C—H...N contacts.

Poly[bis­(μ₇-3-sulfonato-L-alaninato)sodiumzinc]

The hydro­thermal reaction of Zn(CH₃COO)₂, NaOH and L-cysteic acid produced the title compound, [Na₂Zn(C₃H₅NO₅S)₂]_n. The Zn^II cation is situated on an inversion centre and is in a distorted octa­hedral environment, being chelated by two deprotoned L-cysteic acid ligands through two amino N atoms and two carb­oxy­lic O atoms, with the two axial positions occupied by two carb­oxy­lic O atoms from two other L-cysteic acid ligands. Each L-cysteic acid ligand bridges five Na^I ions via its sulfonate group and two Zn^II ions via its carboxyl group, forming a three-dimensional framework. Weak N—H...O hydrogen bonding is observed in the crystal structure.

[1,1′-Dibenzyl-2,2′-(2-oxapropane-1,3-diyl)di(1H-benzimidazole)-κ³N³,O,N^3′]bis(2,4,6-trinitrophenolato-κO¹)manganese(II)

In the title complex, [Mn(C₆H₂N₃O₇)₂(C₃₀H₂₆N₄O)], the Mn^II atom is coordinated by the tridentate bis-benzimidazole ligand and two atoms of the picrate anions, in a distorted square-pyramidal geometry (τ = 0.038). One nitro O atom of one picrate ion is disordered over two sites with occupancies of 0.54 (5) and 0.46 (5).

Aqua­[2,2′-(propane-1,3-di­yl)bis­(5-car­boxy-1H-imidazole-4-carboxyl­ato)-κ⁴N³,O⁴:N^3′,O^4′](pyridine-κN)cobalt(II)–4,4′-bipyridine (1/1)

In the title compound, [Co(C₁₃H₁₀N₄O₈)(C₅H₅N)(H₂O)]·C₁₀H₈N₂, the asymmetric unit comprises half a Co^II complex located on a mirror plane and half a cocrystallized mol­ecule of 4,4′-bipyridine located on an inversion center. The Co^II ion is six coordinate, with distorted octa­hedral geometry, ligated by two N atoms and two O atoms from a 2,2′-(propane-1,3-di­yl)bis­(5-carboxy-1H-imidazole-4-carboxyl­ate) dianion, one N atom from a pyridine mol­ecule and one coordinating water mol­ecule. The Co—O bond lengths range from 2.076 (2) to 2.1441 (15) Å, while the Co—N bond lengths are 2.138 (3) and 2.1515 (17) Å. A two-dimensional network of N—H...O and O—H...N hydrogen bonds stabilizes the crystal packing. There are π–π inter­actions between the bipyridine and imidazole rings [centroid–centroid distance = 3.7694 (4) Å]. The propane-1,3-diyl group is disordered over two conformations, with refined occupancies of 0.755 (8) and 0.245 (8).

Triaqua[2,2′-(propane-1,3-diyl)bis(5-carboxy-1H-imidazole-4-carboxylato-κ²N³,O⁴)]calcium(II) tetrahydrate

In the title compound, [Ca(C₁₃H₁₀N₄O₈)(H₂O)₃]·4H₂O, the Ca^II ion is hepta-coordinated by two N atoms and two O atoms from a tetra­dentate 1,3-bis-(1H-imidazole-4,5-dicarb­oxy­l­ate) propane dianion and three water O atoms, giving a distorted penta­gonal–bipyramidal coordination environment. The Ca—O bond lengths are in the range 2.354 (3)–2.453 (2) Å, while the Ca—N bond lengths are in the range 2.523 (2)–2.548 (2) Å. An intra­molecular O—H...O hydrogen bond between the carb­oxy and carboxyl­ate groups stabilizes the mol­ecular configuration. A three-dimensional network of N—H...O and O—H...O hydrogen bonds help to stabilize the crystal packing.

Trichlorido[4-meth­oxy-2,6-bis­(2-pyrimidin-2-yl-κN)phenyl-κC¹]platinum(IV) acetonitrile monosolvate

In the title complex, [Pt(C₁₅H₁₁N₄O)Cl₃]·CH₃CN, the Pt^IV ion adopts a distorted octa­hedral coordination geometry defined by a tridentate cyclo­metalated NCN ligand and three Cl atoms. In the crystal, individual mol­ecules are aggregated into a three-dimensional network by C—H...Cl hydrogen-bonding inter­actions and π–π stacking inter­actions between the tridentate ligands, the shortest ring centroid–centroid distance being 3.613 Å.

2,4-Diiodo-3-nitro­anisole

In the title compound (systematic name: 1,3-diiodo-4-meth­oxy-2-nitro­benzene), C₇H₅I₂NO₃, the dihedral angle between the benzene ring and the nitro group is 88.0 (3)°, and the methyl group lies almost in the same plane as the ring [deviation = 0.034 (6) Å]. In the crystal, aromatic π–π stacking occurs between inversion-related rings [centroid–centroid separation = 3.865 (3) Å and slippage = 0.642 Å]. A possible weak C—I...π inter­action occurs [I...π = 3.701 (2) Å and C—I...π = 130.18 (13)°], but there are no significant inter­molecular I...I contacts.

4-[(2-Bromo­benzyl­idene)amino]-3-(pyridin-4-yl)-1H-1,2,4-triazole-5(4H)-thione

In the title compound, C₁₄H₁₀BrN₅S, the dihedral angle between the triazole ring and the pyridine and bromo­benzene rings are 26.42 (13) and 6.28 (13)°, respectively. The molecule exists as a thione in the solid state. In the crystal, mol­ecules are linked by N—H...N hydrogen bonds, generating [010] C(8) chains.

(R*)-Methyl 2-(2,6-dimeth­oxy-3,5-di­nitro­benzamido)­propano­ate

In the title mol­ecule, C₁₃H₁₅N₃O₉, the nitro groups are tilted with respect to the benzene mean plane by 22.8 (3) and 31.6 (3)°. The meth­oxy groups are in a cis orientation relative to the ring. In the crystal, mol­ecules are linked by strong N—H...O hydrogen bonds into C(3) chains along [100].

3,6-Di-tert-butyl-9-(quinolin-6-yl)-9H-carbazole

In the title compound, C₂₉H₃₀N₂, the dihedral angle between the mean planes of the carbazole and the quinoline systems is 52.41 (6)°. Mol­ecules are linked into dimers by pairs of inter­molecular C—H...N hydrogen bonds and into a three-dimensional network by C—H...π inter­actions.

Methyl 2-(3,5-dinitro­benzamido)-3-methyl­butano­ate

In the title compound, C₁₃H₁₅N₃O₇, the dihedral angle between the amide plane (r.m.s. deviation = 0.008 Å) and the benzene ring is 33.2 (2)°. In the crystal, mol­ecules are connected by N–H...O=C hydrogen bonds, forming a chain along the b-axis direction.