Bis(1-benzyl-1H-benzimidazole-κN³)di­chlorido­zinc

In the title compound, [ZnCl₂(C₁₄H₁₂N₂)₂], the Zn^II atom exhibits a distorted tetra­hedral coordination geometry involving two chloride anions and two N-atom donors from 1-benzyl-1H-benzimidazole ligands. In both ligands, the benzyl and benzimidazole rings are nearly perpendicular [dihedral angles = 81.7 (2) and 81.5 (2)°]. The two benzimidazole systems are essentially planar [maximum deviations = 0.015 (3) and 0.020 (2) Å] and form a dihedral angle of 78.09 (8)°. In the crystal, centrosymmetrically related mol­ecules are linked by pairs of C—H...Cl hydrogen bonds into chains parallel to the a axis.

Ethyl 2-{5-[(3-oxo-3,4-di­hydro-2H-1,4-benzo­thia­zin-4-yl)meth­yl]-1H-1,2,3-triazol-1-yl}acetate

In the title compound, C₁₅H₁₆N₄O₃S, the six-membered heterocycle of the benzo­thia­zine fragment exhibits a screw boat conformation. The dihedral angle between the planes through the triazole ring and the benzene ring fused to the 1,4-thia­zine ring is 62.98 (11)°. The mean plane formed by the atoms belonging to the acetate group is nearly perpendicular to the triazole ring [dihedral angle = 74.65 (12)°]. In the crystal, mol­ecules are linked by pairs of C—H...O inter­actions, forming dimeric aggregates.

4-[(1-Benzyl-1H-1,2,3-triazol-4-yl)meth­yl]-2H-1,4-benzo­thia­zin-3(4H)-one

In the title compound, C₁₈H₁₆N₄OS, the six-membered heterocycle of the benzo­thia­zine fragment exhibits a screw-boat conformation. The dihedral angles between the plane through the triazole ring and those through the fused and terminal benzene rings are 76.68 (11) and 71.0 (1)°, respectively; the benzene rings are nearly perpendicular [dihedral angle = 79.6 (1)°]. In the crystal, mol­ecules are linked by C—H...N and C—H...O inter­actions, forming a three-dimensional network.

3-(2,3-Dioxoindolin-1-yl)propane­nitrile

The asymmetric unit of the title compound, C₁₁H₈N₂O₂, contains two independent mol­ecules (A and B). Each mol­ecule is build up from fused five- and six-membered rings with the former linked to a cyano­ethyl group. The indoline ring and two carbonyl O atoms of each mol­ecule are nearly coplanar, with the largest deviations from the mean planes being 0.0198 (9) (mol­ecule A) and 0.0902 (9) Å (mol­ecule B), each by a carbonyl O atom. The fused ring system is nearly perpendicular to the mean plane passing through the cyano­ethyl chains, as indicated by the dihedral angles between them of 69.72 (9) (mol­ecule A) and 69.15 (9)° (mol­ecule B). In the crystal, mol­ecules are linked by C—H...O and π–π [inter­centroid distance between inversion-related indoline (A) rings = 3.6804 (7) Å] inter­actions into a double layer that stacks along the a-axis direction.

4-[(1-Benzyl-1,2,3-triazol-5-yl)meth­yl]-2H-1,4-benzo­thia­zin-3(4H)-one

The asymmetric unit of the title compound, C₁₈H₁₆N₄OS, contains two independent mol­ecules of similar conformation, the most relevant difference being the dihedral angle formed by the benzene rings [57.8 (2) and 52.7 (2)°]. The six-membered heterocycle of the benzo­thia­zine fragment exhibits a screw-boat conformation in both mol­ecules. The plane through the triazole ring is nearly perpendicular to those through the fused and terminal benzene rings [dihedral angles of 74.2 (2) and 83.2 (2)° in one mol­ecule, and 77.8 (2) and 82.9 (2)° in the other]. In the crystal, mol­ecules are linked by C—H...N and C—H...O hydrogen bonds into chains parallel to the a-axis direction. The crystal used was a non-merohedral twin, the refined ratio of twin components being 0.85 (10):15 (10).

1-[(1-Benzyl-1H-1,2,3-triazol-4-yl)meth­yl]indoline-2,3-dione

In the title compound, C₁₈H₁₄N₄O₂, the triazole ring makes dihedral angles of 77.32 (8) and 75.56 (9)°, respectively, with the indoline residue and the terminal phenyl group. In the crystal, mol­ecules are linked by C—H...N hydrogen bonds into tapes parallel to the b axis. The tapes are linked together by π–π inter­actions between triazole rings [inter-­centroid distance = 3.4945 (9) Å].

(2Z)-2-Benzyl­idene-4-(prop-2-yn-1-yl)-2H-1,4-benzo­thia­zin-3(4H)-one

The mol­ecule of the title compound, C₁₈H₁₃NOS, is build up from two fused six-membered rings, with the heterocyclic component linked to a benzyl­idene group and to a prop-2-yn-1-yl chain. The six-membered heterocycle adopts a distorted screw-boat conformation. The prop-2-yn-1-yl chain is almost perpendicular to the mean plane through benzo­thia­zine as indicated by the C-N-C-C torsion angle of 86.5 (2)°. The dihedral angle between the benzene rings is 47.53 (12)°. There are no specific inter­molecular inter­actions in the crystal packing.

4-(Prop-2-yn­yl)-2H-1,4-benzo­thia­zin-3(4H)-one

In the title compound, C₁₁H₉NOS, the six-membered heterocycle of the benzo­thia­zine fragment exhibits a screw-boat conformation. The benzene ring makes a dihedral angle of 79.4 (1)° with the mean plane through the prop-2-ynyl chain and the ring N atom. In the crystal, mol­ecules are linked by C—H...O inter­actions of the acetyl­enic C—H group towards the carbonyl O atom of a neighbouring mol­ecule, forming zigzag chains running along the b-axis direction.

(2Z)-2-Benzyl­idene-4-n-butyl-3,4-di­hydro-2H-1,4-benzo­thia­zin-3-one

In the title compound, C₁₉H₁₉NOS, the six-membered hetero­cyclic ring of the benzo­thia­zine fragment exhibits a screw boat conformation. The plane of the fused benzene ring makes a dihedral angle of 72.38 (12)° with that of the terminal phenyl ring, and is nearly perpendicular to the mean plane formed by the atoms through the n-butyl chain, as indicated by the dihedral angle of 88.1 (2)°. In the crystal, mol­ecules are linked by C—H...O inter­actions to form supra­molecular chains along [110].