5-Diethyl­amino-2-{(E)-[(3-iodo­phen­yl)imino]­meth­yl}phenol

The title Schiff base, C17H19IN2O, is not planar, displaying a dihedral angle of 34.9 (2)° between the two aromatic rings. The mol­ecular conformation allows the formation of a strong intra­molecular O—H⋯N hydrogen bond with graph-set motif S(6) between the hy­droxy group and the imine N atom

Diaqua­bis(ethyl­enediamine-κ2 N,N′)copper(II) 2,2′-dithio­dinicotinate sesquihydrate

In the title compound, [Cu(C2H8N2)2](C12H6N2O4S2)·1.5H2O, there are two half-molecules of the cationic complex in the asymmetric unit. The Cu2+ ions lie on inversion centres and are octa­hedrally coordinated by two ethyl­enediamine (en) and two aqua ligands in a typical Jahn–Teller distorted environment with the water O atoms in the axial positions. Two 2-mercaptonicotinate units (mnic) are linked by a disulfide bridge. All the ethyl­enediamine N—H and O—H groups form inter­molecular hydrogen bonds with acceptor O and N atoms, giving rise to a three-dimensional network. One of the uncoordinated water molecules has a site occupation factor of 0.5

2,4-Dibromo-2,3-dihydro-1H-inden-1-yl acetate

In the title compound, C11H10Br2O2, the cyclo­pentene ring fused to the benzene ring adopts an envelope conformation, with the C atom attached to the Br atom as the flap. The crystal structure does not exhibit any classical hydrogen bonds. The mol­ecular packing is stabilized by van der Waals forces and π–π stacking inter­actions with a centroid–centroid distance of 3.811 (4) Å

trans-Bis[2-(piperazin-1-yl)­ethan­amine]­bis­(saccharinato)cobalt(II)

In the centrosymmetric title complex, [Co(C7H4NO3S)2(C6H15N3)2], the CoII ion is coordinated by two saccharinate (sac) anions and two neutral 2-piperazin-1-ylethanamine (ppzea) ligands, showing a distorted octa­hedral coordination. Sac is O-bonded via the carbonyl group, while ppzea acts as an N,N′-bidentate chelating ligand. The mol­ecules are connected by N—H⋯N and N—H⋯O hydrogen bonds, forming a linear chain running parallel to the crystallographic a axis. The compound is isostructural with the reported Ni, Zn, and Cd analogues

3-Amino-4-[4-(dimethyl­amino)­phen­yl]-4,5-dihydro-1,2,5-thia­diazole 1,1-dioxide

The title compound, C10H14N4O2S, exists in the amine tautomeric form. The dihedral angle between the benzene and thia­diazo­lidine rings is 66.54 (19)°. In the crystal, mol­ecules are linked by N—H⋯O and N—H⋯N hydrogen bonds into a layer parallel to the ac plane. The layers are further linked by C—H⋯O hydrogen bonds

1,3-Dimethyl-2,6-diphenyl­piperidin-4-one

In the title moleclue, C19H21NO, the 4-piperidone ring adopts a chair conformation in which the two benzene rings and the methyl group attached to C atoms all have equatorial orientations. In the crystal structure, centrosymmetric dimers are formed through weak inter­molecular C—H⋯O hydrogen bonds [the dihedral angle between the aromatic rings is 58.51 (5)°]

(2Z,N′E)-N′-[(2-Hy­droxy-1-naphth­yl)methyl­idene]furan-2-carbohydrazonic acid

In the title compound, C16H12N2O3, the dihedral angle between the mean planes of the naphthalene ring system and the furan ring is 21.3 (6)°. The mol­ecular structure is stabilized by an intra­molecular O—H⋯N hydrogen bond, which generates an S(6) graph-set motif

(E,E)-N′-{4-[(2-Benzoyl­hydrazin-1-yl­idene)meth­yl]benzyl­idene}benzo­hydrazide

In the title compound, C22H18N4O2, the mol­ecules lie across an inversion centre. The dihedral angle between the mean planes of the central and terminal benzene rings is 66.03 (2)°. The mol­ecule displays trans and anti conformations about the C=N and N—N bonds, respectively. In the crystal, N—H⋯O hydrogen bonds, with the O atoms of C=O groups acting as acceptors, link the mol­ecules into a chain along [101]