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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.

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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.

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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.

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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.
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