Di­chlorido­(4-{[(quinolin-2-yl)methyl­idene]amino}phenol-κ²N,N′)mercury(II)

In the mononuclear title complex, [HgCl₂(C₁₆H₁₂N₂O)], synthesized from the phenolic Schiff base 4-[(quinolin-2-yl­methyl­idene)amino]­phenol (QMAP), the coordination geometry around Hg²⁺ is distorted tetra­hedral, comprising two Cl atoms [Hg—Cl = 2.3565 (12) and 2.5219 (12) Å] and two N-atom donors from the QMAP ligand, viz. one imine and the other quinoline [Hg—N = 2.392 (2) and 2.237 (2) Å, respectively]. In the crystal, O—H...Cl hydrogen bonds generate a chain structure extending along the c-axis direction. Weak C—H...Cl and π–π stacking inter­actions [minimum ring centroid separation = 3.641 (3) Å] give an overall layered structure lying parallel to (001).

Di­chlorido­(N,N-diethyl-4-{[(quinolin-2-yl)methyl­idene]amino-κ²N,N′}aniline)mercury(II)

In the mononuclear title complex, [HgCl₂(C₂₀H₂₁N₃)], synthesized from the quinoline-derived Schiff base N¹,N¹-diethyl-N⁴-(quinolin-2-yl­methyl­idene)benzene-1,4-di­amine (QMBD), the coordination geometry around the Hg²⁺ atom is distorted tetra­hedral, comprising two Cl atoms [Hg—Cl = 2.3654 (19) and 2.4394 (18) Å] and two N-atom donors from the QMBD ligand, viz. one imine and quinoline [Hg—N = 2.334 (5) and 2.340 (5) Å, respectively]. In the crystal, weak C—H...Cl hydrogen bonds and weak π–π aromatic ring stacking inter­actions [minimum ring-centroid separation = 3.680 (4) Å] give an overall three-dimensional network.

[Bis(quinolin-2-ylcarbon­yl)amido-κ³N,N′,N′′]bromido­(N,N-di­methyl­formamide-κO)copper(II)

In the mononuclear title complex, [CuBr(C₂₀H₁₂N₃O₂)(C₃H₇NO)], synthesized from the quinoline-derived reduced Schiff base 4-(quinolin-2-ylmeth­yl)amino­phenol, the coordination geometry around Cu²⁺ is distorted square-pyramidal, comprising a bromide anion at the apex [Cu—Br = 2.4671 (5) Å]. The base of the pyramid is built up from one di­methyl­formamide O-atom donor [Cu—O = 2.078 (2) Å] and three N-atom donors from the monoanionic, tridentate bis­(quinolin-2-ylcarbon­yl)di­imide ligand [Cu—N_di­imide = 1.941 (3) Å, and Cu—N_quinol­yl = 2.060 (3) and 2.049 (3) Å]. An intra­molecular C—H...O occurs. In the crystal, weak methyl and aromatic C—H...Br and formyl C—H...O_carbon­yl hydrogen-bonding inter­actions generate an overall layered structure lying parallel to (001).

N¹-[(1H-Imidazol-2-yl)methyl­idene]-N⁴-phenyl­benzene-1,4-di­amine

The title compound, C₁₆H₁₄N₄, is non-planar with dihedral angles between the planes of the imidazole and phenyl­enedi­amine rings of 30.66 (4)° and between the planes of the phenyl­enedi­amine and N-phenyl rings of 56.63 (7)°. In the crystal, mol­ecules are connected by N—H...N hydrogen bonds, generating a chain extending along the b-axis direction. The crystal structure is also stabilized by C—H...π inter­actions between N-phenyl and imidazole rings and slipped π–π stacking inter­actions between imidazole rings [centroid–centroid distance = 3.516 (4) Å] giving an overall two-dimensional layered structure lying parallel to (010).

2,2,6,6-Tetra­bromo-3,4,4,5-tetra­meth­oxy­cyclo­hexa­none

In the title compound, C₁₀H₁₄Br₄O₅, synthesized from the meth­oxy Schiff base N-(pyridin-2-ylmeth­yl)meth­oxy­aniline and mol­ecular bromine, the cyclo­hexa­none ring has a chair conformation with one of the four meth­oxy groups equatorially orientated with respect to the carbonyl group and the others axially orientated. The C—Br bond lengthsvary from 1.942 (4) to1.964 (4) Å. In the crystal, weak C—H...O_carbon­yl hydrogen-bonding inter­actions generate chains extending along the b-axis direction. Also present in the structure are two short inter­molecular Br...O_meth­oxy inter­actions [3.020 (3) and 3.073 (4) Å].

Crystal structure of N¹-phenyl-N⁴-[(quinolin-2-yl)methyl­idene]benzene-1,4-di­amine

In the title compound, C₂₂H₁₇N₃, the dihedral angles between the central benzene ring and the terminal phenyl ring and quinoline ring system (r.m.s. deviation = 0.027 Å) are 44.72 (7) and 9.02 (4)°, respectively, and the bond-angle sum at the amine N atom is 359.9°. In the crystal, the N—H group is not involved in hydrogen bonding and the mol­ecules are linked by weak C—H...π inter­actions, generating [010] chains.