Xi-Shi Tai

{2,2′-[4-Methyl-4-aza­heptane-1,7-diylbis(nitrilo­methyl­idyne)]diphenolato}zinc(II)

In the title compound, [Zn(C21H25N3O2)], the ZnII atom is five-coordinate from three N donor atoms and two O donor atoms of the dianion ligand in a distorted trigonal–bipyramidal arrangement. Three methylene groups of the ligand are disordered over two orientations in a 0.555 (6):0.445 (6) ratio.

N'-(3-Ethoxy-2-hydroxybenzylidene)-benzenesulfonohydrazide.

There are two molecules in the asymmetric unit of the title compound, C15H16N2O4S, both of which are stabilized by an intramolecular O—H⋯N hydrogen bond. Intermolecular N—H⋯O hydrogen bonds lead to [101] chains of molecules in the crystal structure.

2,2'-(1,1'-Azinodiethyl-idyne)diphenol.

In the title molecule, C16H16N2O2, the C—N bond lengths are 1.295 (5) and 1.300 (5) Å, which suggests that they are double bonds. The structure is stabilized by intramolecular O—H⋯N and C—H⋯N, and intermolecular C—H⋯O hydrogen-bond interactions.

4-Amino-2-methyl­quinoline monohydrate

The crystal structure of the title compound, C10H10N2·H2O, is stabilized by intermolecular O—H⋯N, N—H⋯O and N—H⋯N hydrogen bonds.

2-Chloro-N-[4-(dimethyl­amino)benzyl­idene]aniline

In the title molecule, C15H15ClN2, the dihedral angle between the aromatic is 64.1 (2)°.

Hexaaqua-zinc(II) bis-[4-(2-hydroxy-benzyl-ideneamino)benzene-sulfonate].

In the title compound, [Zn(H2O)6](C13H10NO4S)2, a distorted ZnO6 octahedron results from the coordination by the six water molecules. Only three of the water molecules are crystallographically unique, as the Zn atom lies on an inversion center. The Zn—O bond lengths are in the range 2.054 (4)–2.073 (4) Å. A network of hydrogen bonds helps to establish the crystal packing.

N′-[1-(2-Hydroxy­phen­yl)ethyl­idene]benzene­sulfonohydrazide

In the title compound, C14H14N2O3S, the conformation is stabilized by an intramoleclar O—H⋯N hydrogen bond and the dihedral angle between the aromatic ring planes is 79.55 (18)°. In the crystal structure, intermolecular N—H⋯O hydrogen bonds lead to [100] chains of molecules.

Hexaaqua-magnesium bis-{4-[(5-bromo-2-hy-droxy-benzyl-idene)amino]-benzene-sulfonate} dihydrate.

In the title hydrated molecular salt, [Mg(H2O)6](C13H9BrNO4S)2·2H2O, the Mg2+ ion (site symmetry ) adopts a near regular MgO6 octahedral coordination geometry. In the anion, the dihedral angle between the aromatic rings is 2.5 (2)° and an intramolecular O—H⋯N hydrogen bond generates an S(6) ring. In the crystal, the components are linked by O—H⋯O and O—H⋯Br hydrogen bonds.

(4-Amino-3-methyl­benzene­sulfonato)tri-μ-aqua-penta­aqua­disodium 4-amino-3-methyl­benzene­sulfonate

In the title compound, [Na2(C7H8NO3S)(H2O)8](C7H8NO3S), one Na+ ion is bonded to six water molecules in a distorted octahedral arrangement while the other is bonded to five water molecules and one O atom of a 4-amino-3-methylbenzenesulfonate anion, also yielding a distorted NaO6 octahedron. Three of the water molecules bridge the metal ions and an intramolecular O—H⋯O hydrogen bond helps to establish the conformation. In the crystal, the component species interact by way of O—H⋯O, O—H⋯N and N—H⋯O hydrogen bonds.

Hexaaqua­magnesium(II) bis­[4-(3-eth­oxy-2-hydroxy­benzyl­ideneamino)-3-methyl­benzene­sulfonate]

In the title compound, [Mg(H2O)6](C16H16NO5S)2, the Mg2+ ion (site symmetry 2) adopts an almost regular octahedral coordination geometry. The anion is stabilized by an intramolecular O—H⋯N hydrogen bond, generating an S(6) ring, and the dihedral angle between the aromatic rings is 41.02 (7)°. In the crystal, the cations and anions are linked by O—H⋯O hydrogen bonds, generating sheets lying parallel to (100).