Dichlorido{2-[(2,6-dimethyl­phen­yl)imino­meth­yl]pyridine-κ²N,N′}zinc

In the asymmetric unit of the title compound, [ZnCl₂(C₁₄H₁₄N₂)], the central Zn^II ion is four-coordinated in a distorted tetra­hedral environment by two N atoms of the ligand 2-[(2,6-dimethyl­phen­yl)imino­meth­yl]pyridine and two chloride anions. In the crystal, adjacent mol­ecules are connected through C—H...Cl hydrogen bonds between a C—H group of the ligand and a Cl⁻ anion, leading to a chain-like structure along the b direction.

2-Amino-5-methyl-6-methyl­sulfanyl-4-phenyl­benzene-1,3-dicarbonitrile

The dihedral angle between the planes of the two aromatic rings of the title compound, C₁₆H₁₃N₃S, is 56.7 (3)°. The crystal packing is stabilized by inter­molecular N—H...N hydrogen bonds, which link the mol­ecules into chains along [11].

Poly[[bis­[3-(1H-tetra­zol-1-yl)propanoic acid-κN⁴]cadmium]-di-μ-thio­cyanato-κ²N:S;κ²S:N]

In the title compound, [Cd(NCS)₂(C₄H₆N₄O₂)₂]_n, the Cd^II cation is located on an inversion center and is coordinated by two N and two S atoms from four SCN⁻ anions and two N atoms from two 3-(1H-tetra­zol-1-yl)propanoic acid (Htzp) ligands in a distorted octa­hedral geometry. The SCN⁻ anions bridge the Cd^II cations into a layer structure parallel to (100). A weak intra­molecular C—H...N inter­action occurs. The layers are further assembled into a three-dimensional supra­molecular structure via classical O—H...O hydrogen bonds.

4-Bromo-2-meth­oxy-6-(1-phenyl-1H-benzimidazol-2-yl)phenol

The title compound, C₂₀H₁₅BrN₂O₂, crystallized with three independent molecules in the asymmetric unit. Intramolecular O—H...N hydrogen bonds induce coplanarity of the substituted benzene ring and the benzimidazole ring, with mean deviations from the planes of 0.0931 (10), 0.0448 (10) and 0.0083 (11) Å in the three mol­ecules.

catena-Poly[[gallium(III)-bis­[μ-D/L-tartrato(2−)]-gallium(III)-di-μ-hydroxido] dihydrate]

In the title compound, {[Ga₂(C₄H₄O₆)₂(OH)₂]·2H₂O}_n, the Ga^III atom is located on a twofold rotation axis and is six-coordinated by two O atoms from bridging hydroxide groups and four O atoms from two symmetry-related tartrate units in a slightly distorted octa­hedral environment. Each tartrate unit binds to two Ga^III atoms as a bis-chelating bridging ligand by two pairs of hydroxide groups and an O atom of a carboxyl­ate group. The Ga^III atoms are linked by two bridging hydroxide groups located on mirror planes. In this way a chain along the c axis is formed. Free water mol­ecules on mirror planes are located between the chains and hold them together through hydrogen-bonding inter­actions, with O...O distances in the range 2.509 (3)–3.179 (5) Å.

6β-Methyl-3,20-dioxopregn-4-en-17-yl acetate

The title compound, C₂₄H₃₄O₄, is a precursor of Megestrol acetate. Ring A has a half-chair conformation [Q = 0.446 (3) Å, θ = 54.6 (4)° and φ = 9.5 (4)°]. Ring D adopts a 13β-envelope conformation [Q = 0.463 (2) Å and φ = 188.2 (3)°].

{2,2′-[Cyclo­hexane-1,2-diylbis(nitrilo­methanyl­ylidene)]diphenolato}copper(II)

The title compound, [Cu(C₂₀H₂₀N₂O₂)], crystallizes with two independent mol­ecules in the asymmetric unit. In each mol­ecule, the Cu^II atom occupies the tetra­dentate N₂O₂ cavity of the salen-type Schiff base ligand, adopting a distorted square-planar geometry with r.m.s. deviations of the coordin­ating atoms of 0.0522 (2) and 0.1128 (4) Å. No hydrogen bonds or π–π stacking inter­action are observed.

Bis[μ-N′-(5-bromo-3-meth­oxy-2-oxido­benzyl­idene)-2-hydroxybenzohydra­zidato]bis[(N,N-dimethyl­formamide)­copper(II)]

The title compound, [Cu₂(C₁₅H₁₁BrN₂O₄)₂(C₃H₇NO)₂], is derived from the reaction of N′-(5-bromo-2-hy­droxy-3-meth­oxy­benzyl­idene)-2-hy­droxy­benzohydrazide and copper nitrate in a dimethyl­formamide solution in the presence of sodium hydroxide. The compound can be regarded as a binuclear centrosymmetric complex. In the crystal, the Cu^II atom is fivefold surrounded and adopts a distorted square-pyramidal coordination environment. An intra­molecular O—H...N hydrogen bond stabilizes the mol­ecular conformation.

2-[4-(Benz­yloxy)benzyl­idene]malononitrile

In the title mol­ecule, C₁₇H₁₂N₂O, the dihedral angle between the two benzene rings is 84.98 (10)°. The dicyano­ethyl­ene group is coplanar with the benzene ring to which it is bonded. No classic hydrogen bonds were found in the crystal.

(E)-N′-(5-Bromo-2-hy­droxy-3-meth­oxy­benzyl­idene)-2-hy­droxy­benzohydrazide monohydrate

The organic molecule of the title hydrate, C₁₅H₁₃BrN₂O₄·H₂O, is roughly planar, with a mean deviation of 0.0939 (2) Å. The dihedral angle between the two aromatic rings is 8.2 (3)°. Intra­molecular O—H...N and O—H...O hydrogen bonds are observed. In the crystal, N—H...O(water) and O(water)—H...O hydrogen bonds lead to a three-dimensional network.

(Z)-4-[(3-Aminona­phthalen-2-yl­amino)(phen­yl)methyl­idene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one

The mol­ecule of the title compound, C₂₇H₂₂N₄O, assumes a non-planar conformation in which the pyrazolone ring forms dihedral angles of 12.73 (11), 65.17 (6) and 49.82 (6)°, respectively, with the two benzene rings and the naphthalene ring system. In the crystal, pairs of mol­ecules are linked by inter­molecular N—H...N hydrogen bonds, forming dimers. The secondary amino group is involved in an intra­molecular N—H...O hydrogen bond.

3-(9H-Fluoren-9-yl)-1,3-diphenyl­propan-1-one

In the title compound, C₂₈H₂₂O, the fluorene ring system is approximately planar [maximum deviation = 0.044 (2) Å] and forms dihedral angles of 69.88 (6) and 89.46 (6)° with the phenyl rings. The crystal packing is stabilized by weak π–π stacking inter­actions, with centroid–centroid distances of 3.7172 (13) and 3.7827 (11) Å.

(Z)-4-[(2-Amino-4,5-dichloro­anilino)(phenyl)methyl­idene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one

The mol­ecule of the title compound, C₂₃H₁₈Cl₂N₄O, assumes a non-planar conformation in which the pyrazolone ring forms dihedral angles of 32.61 (19), 76.73 (14) and 52.57 (19)° with the three benzene rings. The secondary amino group is involved in an intra­molecular N—H...O hydrogen bond. In the crystal, mol­ecules are linked by pairs of N—H...O hydrogen bonds, forming inversion dimers. An offset stacking inter­action is observed between the chloro-substituted benzene rings protruding on both sides of these dimers [centroid–centroid distance = 3.862 (1) Å].