Bis(1,10-phenanthrolin-1-ium) tetra­chlorido­zincate monohydrate

In the crystal structure of the title compound, (C₁₂H₉N₂)₂[ZnCl₄]·H₂O, the two independent 1,10-phenanthrolinium cations are bridged by the water mol­ecule and the tetrahedral tetrachloridozincate anion via N—H...O, O—H...Cl and N—H...Cl hydrogen bonds, forming chains along [100]. The chains are linked via C—H...Cl hydrogen bonds and a number of π–π inter­actions [centroid–centroid distances vary from 3.5594 (14) to 3.7057 (13) Å], forming a three-dimensional network. In each 1,10-phenanthrolinium cation, there is a short N—H...N inter­action.

Crystal structures of ethyl (2S*,2′R*)-1′-methyl-2′′,3-dioxo-2,3-di­hydro­dispiro­[1-benzo­thio­phene-2,3′-pyrrolidine-2′,3′′-indoline]-4′-carboxyl­ate and ethyl (2S*,2′R*)-5′′-chloro-1′-methyl-2′′,3-dioxo-2,3-di­hydro­dispiro­[1-benzo­thio­phene-2,3′-pyrrolidine-2′,3′′-indoline]-4′-carboxyl­ate

The title compounds, (I) and (II), are di­spiro-indole-pyrrolidine-benzo­thio­phene derivatives, with (II) having a chlorine substituent on the oxo­indole unit. As a result, the conformation of the two mol­ecules differs in the angle of inclination of the indole moiety with respect to the benzo­thio­phene ring system, with a dihedral angle of 71.59 (5) in (I) and 82.27 (7)° in (II).

(4S)-3-Methyl-5,6,7,8-tetra­hydro-4H-spiro­[[1,2]oxazolo[5,4-b]quinoline-4,3′-indole]-2′,5-dione

In the title compound, C₁₈H₁₅N₃O₃, the dihedral angle between the mean planes of the quinoline and indole ring systems [r.m.s. deviations = 0.189 (2) and 0.027 (2) Å, respectively] is 88.65 (5)°. The cyclo­hexene ring of the quinoline ring system adopts an envelope conformation with the central –CH₂– C atom as the flap. In the crystal, mol­ecules are linked by two pairs of N—H...O hydrogen bonds, forming inversion dimers, and enclosing R₂²(14) ring motifs. This arrangement results in the formation of chains propagating along [100].

(4S)-5′-Chloro-3,7,7-trimethyl-5,6,7,8-tetra­hydro-4H-spiro­[1,2-oxazolo[5,4-b]quinoline-4,3′-indole]-2′,5-dione

In the title compound, C₂₀H₁₈ClN₃O₃, the five- and six-membered heterocycles fused through a spiro C atom are inclined to each other at an angle of 87.4 (1)°. In the tricyclic ring system, the cyclo­hexene ring adopts an envelope conformation with the spiro atom as the flap. In the crystal, two sets of N—H...O hydrogen bonds link the mol­ecules into columns containing centrosymmetric R₂²(7) ring motifs and propagating along the b-axis direction.

catena-Poly[[[bis­(1H-imidazole-κN³)zinc(II)]-μ₂-imidazol-1-ido-κ²N:N′] nitrate]

The title compound, {[Zn(C₃H₃N₂)(C₃H₄N₂)₂]NO₃}_n, is a one-dimensional coordination polymer along [01-1] with the Zn^II atom coordinating to four imidazole/imidazolide rings. The Zn^II atom has a regular tetra­hedral geometry with the planes of the two monodentate imidazole rings inclined to one another by 87.94 (17)°, while the planes of the bridging imidazolide rings are inclined to one another by 39.06 (17)°. In the crystal, the chains are linked via bifurcated N—H...(O,O) hydrogen bonds, forming sheets parallel to (001). These two-dimensional networks are linked via C—H...O hydrogen bonds and a C—H...π inter­action, forming a three-dimensional structure.

Bis(isoquinolin-2-ium) tetra­chlorido­zincate dihydrate

In the title compound, (C₉H₈N)₂[ZnCl₄]·2H₂O, the tetra­chlorido­zincate ion is located on a twofold rotation axis with the Zn atom on a special position. The crystal packing is stabilized by N—H...O and O—H...Cl inter­actions.

Crystal structures of methyl 3-phenyl-4,5-di­hydro-1H,3H-benzo[4,5]imidazo[2,1-c][1,4]oxazepine-4-carboxyl­ate and methyl 1-methyl-3-phenyl-4,5-di­hydro-1H,3H-benzo[4,5]imidazo[2,1-c][1,4]oxazepine-4-carboxyl­ate

In two benzo[4,5]imidazo[2,1-c][1,4]oxazepine-4-carboxyl­ates, the seven-membered oxazepane rings both have a twist-chair conformation. The dihedral angle between the phenyl ring and the benzimidazole ring system is significantly smaller in one of the compounds, viz. 73.42 (10) compared to 83.07 (17)°.

Crystal structure of (2E)-N-methyl-2-(2-oxo-1,2-di­hydroacenaphthylen-1-ylidene)hydrazinecarbo­thioamide

In the title compound, the acenapthylene ring system and the hydrazinecarbo­thio­amide unit (=N—NH—C=S—NH–) are essentially coplanar, making a dihedral angle of 1.59 (9)°. The mol­ecular conformation is stabilized by two weak intra­molecular hydrogen bonds (N—H...O and N—H...N), which generate S(6) and S(5) ring motifs.

Crystal structure of trans-aqua­(perchlorato-κO)bis­(propane-1,3-di­amine-κ²N,N′)copper(II) perchlorate

In the title compound, the Cu^II atom has a distorted octa­hedral coordination sphere coordinated by the N atoms of two propane-1,3-di­amine ligands in the equatorial plane. The axial positions are occupied by a water O atom and an O atom of a disordered perchlorate anion [occupancy ratio 0.631 (9):369 (9)].

Isopropyl 1-benzoyl-4-benzo­yloxy-2,6-di­phenyl-1,2,3,6-tetrahydropyridine-3-carboxyl­ate

In the title compound, C₃₅H₃₁NO₅, the piperidine ring has an envelope conformation, with the phenyl-substituted C atom adjacent to the methyl­ene C atom as the flap. This flap atom deviates by 0.633 (2) Å from the mean plane of the other five essentially coplanar atoms in the ring (r.m.s. deviation = 0.044 Å). Intra­molecular C—H...O hydrogen bonds form S(7) and S(9) ring motifs. In the crystal, mol­ecules are linked by pairs of C—H...O hydrogen bonds, forming inversion dimers with R²₂(16) loops.

Crystal structure of (2E)-N-methyl-2-[(4-oxo-4H-chromen-3-yl)methyl­idene]hydrazine­carbo­thio­amide

In the title compound, C₁₂H₁₁N₃O₂S, the dihedral angle between the 4H-chromen-4-one ring system and the –CH=N—NH—CS—NH– unit is 6.22 (1)°. In the crystal, inversion dimers linked by pairs of N—H...O hydrogen bonds generate R₂²(14) loops. The dimers are reinforced by a pair of C—H...O inter­actions, which generate R₂²(10) loops.