Yi-Min Feng

{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.

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.

Penta­aqua­bis[4-(2-hydroxy­benzyl­idene­amino)benzene­sulfonato]lead(II)

In the structure of the title compound, [Pb(C13H10NO4S)2(H2O)5], two S—O bonds and one C—N bond have lengths of 1.421 (9), 1.425 (8) and 1.268 (11) Å, respectively, which suggests they are double bonds. Molecules form a two-dimensional layered structure via O—H⋯O and O—H⋯N interactions. The Pb atom adopts distorted cubo-octahedral coordination.

N-(1-Naphth-yl)acetoacetamide.

The title compound, C14H13NO2, exists in the keto form. An N—H⋯O hydrogen bond helps to establish the packing.

1-Hydroxymethyl-3,12-dioxa-14-aza­tetracyclo[9.2.1.04,14.05,10]tetradecane

In the title fused-ring compound, C12H13NO3, the two five-membered C3NO rings both approximate to envelope conformations with C atoms in the flap positions. The OH group of the pendant CH2OH unit is disordered over two positions in a 0.528 (5):0.472 (5) ratio. One of the OH groups participates in an O—H⋯N hydrogen bond, generating centrosymmetric dimers in the crystal structure.

Bis[2-acetyl-3-methyl-pyrazine (2-hydroxy-benzo-yl)hydrazonato]zinc(II) monohydrate.

In the title compound, [Zn(C14H13N4O2)2]·H2O, the ZnII centre is six-coordinated by four N and two O donors of two 2-acetyl-3-methylpyrazine (2-hydroxybenzoyl)hydrazonate ligands, and forms a distorted octahedral structure.

Bis(2-amino­pyrimidine-κN1)diaqua­dinitrato-κO;κ2O,O′-cadmium(II) monohydrate

In the title compound, [Cd(NO3)2(C4H5N3)2(H2O)2]·H2O, the Cd atom is seven-coordinated by two 2-aminopyrimidine molecules, two water molecules, one bidentate nitrate anion and one monodentate nitrate anion. A network of N—H⋯O, N—H⋯N and O—H⋯O hydrogen bonds helps to consolidate the crystal structure.