(E)-1-(2-Hy­droxy-5-meth­oxy­benzyl­idene)thio­semicarbazide

In the title mol­ecule, C₉H₁₁N₃O₂S, an intra­molecular O—H...N hydrogen bond generates an S(6) ring motif. In the crystal, mol­ecules are linked via pairs of N—H...S inter­actions, forming inversion dimers with R₂²(8) ring motifs. These dimers are further linked via N—H...S and N—H...O hydrogen bonds, forming a two-dimensional network lying parallel to (100). The crystal structure is further stabilized by inter­molecular π–π inter­actions [centroid–centroid distance = 3.7972 (9) Å].

(E)-1-(3-Eth­oxy-2-hy­droxy­benzyl­idene)thio­semicarbazide

The title compound, C₁₀H₁₃N₃O₂S, crystallizes with two independent mol­ecules (A and B) in the asymmetric unit. In the crystal, the A and B mol­ecules are linked via pairs of N—H...O and O—H...S hydrogen bonds, forming dimers with R₂²(14) and R₂²(6) ring motifs. These dimers are linked via a pair of N—H...S hydrogen bonds with an R₂²(8) ring motif, forming chains propagating along the c-axis direction. The crystal was refined as an inversion twin with a final BASF ratio of 0.54 (11):0.46 (11).

Bis(dimethyl­formamide-κO){4,4′,6,6′-tetra­chloro-2,2-[butane-1,4-di­yl(nitrilo­methanylyl­idene)]diphenolato-κ⁴O,N,N′,O′}nickel(II)

In the title Schiff base complex, [Ni(C₁₈H₁₄Cl₄N₂O₂)(C₃H₇NO)₂], the geometry around the Ni^II atom is distorted octa­hedral. It is coordinated by the N₂O₂ donor atoms of the tetra­dentate Schiff base ligand and the O atoms of two dimethyl­formamide mol­ecules, which are cis to one another. The benzene rings are almost normal to each other [dihedral angle = 88.60 (14)°]. The various intra­molecular C—H...O hydrogen bonds make S(5) and S(6) ring motifs. In the crystal, mol­ecules are linked by pairs of weak C—H...Cl inter­actions, forming inversion dimers.

catena-Poly[{μ₃-4,4′,6,6′-tetra­chloro-2,2′-[butane-1,4-diylbis(nitrilo­methanyl­yl­idene)]diphenolato}{μ₂-4,4′,6,6′-tetra­chloro-2,2′-[butane-1,4-diylbis(nitrilo­methanylyl­idene)]diphenolato}dicopper(II)]

The asymmetric unit of the title compound, [Cu₂(C₁₈H₁₄Cl₄N₂O₂)₂]_n, contains two independent Cu^II ions which are bridged by a pair of 4,4′,6,6′-tetra­chloro-2,2′-[butane-1,4-diylbis(nitrilo­methanylyl­idene)]diphenolate ligands, forming a dinuclear unit. One of the Cu^II ions is coordinated in a distorted square-planar environment and the other is coordinated in a distorted square-pyramidal environment. The long apical Cu—O bond of the square-pyramidal coordinated Cu^II ion is formed by a symmetry-related O atom, creating a one-dimensional polymer along [010]. In addition, short inter­molecular Cl...Cl distances [3.444 (2) Å] and weak π–π inter­actions [centroid–centroid distances = 3.736 (2)–3.875 (3) Å] are observed. The crystal studied was an inversion twin with a refined twin component ratio of 0.60 (1):0.40 (1).

catena-Poly[{μ₃-4,4′,6,6′-tetra­bromo-2,2′-[butane-1,4-diylbis(nitrilo­methan­ylyl­idene)]diphenolato}{μ₂-4,4′,6,6′-tetra­bromo-2,2′-[butane-1,4-diylbis(nitrilo­methanylyl­idene)]dipheno­lato}dicopper(II)]

The asymmetric unit of the title coordination polymer consists of a dinuclear neutral complex mol­ecule of formula [Cu₂(C₁₈H₁₄Br₄N₂O₂)₂]_n. One of the Cu^II ions is coordinated in a distorted square-planar geometry, whereas the other is coordinated in a distorted square-pyramidal geometry, the long apical Cu—O bond [2.885 (4) Å] of the square-pyramidal coordination being provided by a symmetry-related O atom creating a one-dimensional polymer along [010]. π–π stacking inter­actions [centroid–centroid distance = 3.783 (4) Å] and short inter­chain Br...Br inter­actions [3.6142 (12)–3.6797 (12) Å] are observed.

{4,4′,6,6′-Tetra­iodo-2,2′-[propane-1,3-diylbis(nitrilo­methanylyl­idene)]diphenolato-κ⁴O,N,N′,O′}nickel(II)

The asymmetric unit of the title compound, [Ni(C₁₇H₁₂I₄N₂O₂)], comprises half of a Schiff base complex. The Ni^II and central C atom of the propyl chain are located on a twofold rotation axis. The geometry around the Ni^II atom is square planar, supported by the N₂O₂ donor atoms of the coordinated ligand. In the crystal, there are no significant inter­molecular inter­actions present. The crystal studied was a non-merohedral twin with a refined twin component ratio of 0.944 (1):0.056 (1).

4,6-Dichloro-2-[(E)-(2-{[(E)-3,5-dichloro-2-oxidobenzyl­idene]aza­nium­yl}eth­yl)iminiumylmeth­yl]phenolate

The asymmetric unit of the title compound, C₁₆H₁₂Cl₄N₂O₂, comprises half of a potentially tetra­dentate Schiff base ligand, located about a twofold rotation axis which bis­ects the central C—C bond of the ethane-1,2-diamine group. In the solid state, the compound exists in the zwitterionic form. There are two intra­molecular N—H...O hydrogen bonds making S(6) ring motifs. In the crystal, mol­ecules are linked by C—H...O hydrogen bonds, forming two-dimensional frameworks which lie parallel to (100). There are also short Cl...Cl [3.4395 (9) Å] contacts present.

4,6-Dichloro-2-((E)-{4-[(E)-3,5-dichloro-2-hy­droxy­benzyl­idene­amino]­butyl­imino}­meth­yl)phenol

The asymmetric unit of the title compound, C₁₈H₁₆Cl₄N₂O₂, comprises half of a potentially tetra­dentate Schiff base ligand. It is located about a twofold rotation axis that bis­ects the central C—C bond of the butane-1,4-diamine group. There are two intra­molecular O—H...N hydrogen bonds making S(6) ring motifs. In the crystal, mol­ecules are linked by pairs of weak C—H...Cl inter­actions, forming inversion dimers, which are further connected by C—H...O hydrogen bonds into two-dimensional frameworks that lie parallel to (001).

4,6-Dibromo-2-[(E)-(4-{[(E)-3,5-dibromo-2-hy­droxy­benzyl­idene]amino}­butyl)­imino­meth­yl]phenol

The asymmetric unit of the title compound, C₁₈H₁₆Br₄N₂O₂, comprises half the molecule, which is located adjacent to an inversion centre at the mid-point of the central C—C bond of the butane-1,4-diamine segment. There are two intra­molecular O—H...N hydrogen bonds making S(6) ring motifs. In the crystal, mol­ecules are linked by pairs of weak C—H...Br inter­actions into chains along [101], which include R₂²(8) ring motifs. These chains are further linked by C—H...O hydrogen bonds, forming a three-dimensional network.

4,4′,6,6′-Tetra­chloro-2,2′-[(1E,1′E)-propane-1,3-diylbis(nitrilo­methanylyl­idene)]diphenol

The title compound, C₁₇H₁₄Cl₄N₂O₂, is generated by crystallographic twofold symmetry. The two benzene rings are inclined to one another by 80.17 (10)°. There are two intra­molecular O—H...N hydrogen bonds, which make S(6) ring motifs. In the crystal, mol­ecules are linked by C—H...O and weak C—H...Cl inter­actions, forming a three-dimensional network.

4,4′,6,6′-Tetra­bromo-2,2′-[(E,E)-ethane-1,2-diylbis(nitrilo­methanylyl­idene)]di­phenol

The asymmetric unit of the title compound, C₁₆H₁₂Br₄N₂O₂, comprises half of a potential tetra­dentate Schiff base ligand. The whole mol­ecule is generated by an inversion center located in the middle of the C—C bond of the ethyl­ene segment. There are intra­molecular O—H...N hydrogen bonds making S(6) ring motifs. In the crystal, no significant inter­molecular inter­actions are observed.

2-[(Z)-(3-{[(Z)-2-Hy­droxy-3,5-diiodo­benzyl­idene]amino}­propyl­imino)­meth­yl]-4,6-diiodo­phenol

In the title compound, C₁₇H₁₄I₄N₂O₂, there are two intra­molecular O—H...N hydrogen bonds, which make S(6) ring motifs. In the crystal, there are no significant inter­molecular inter­actions present.