(6′R*,7′R*)-7′-(1,3,-Diphenyl-1H-pyrazol-4-yl)-1,2,5′,6′,7′,7a',3′′,4′′-octa­hydro-1′H,2′′H-dispiro­[acenaphthyl­ene-1,5′-pyrrolo­[1,2-c][1,3]thia­zole-6′,3′′-[1]benzopyran]-2,4′′-dione

In the title compound, C₄₀H₂₉N₃O₃S, the pyran ring adopts a sofa conformation, the thia­zolidine ring adopts a twisted conformation and the pyrrolidine ring adopts an envelope conformation with the N atom as the flap. The pyrazole ring is essentially planar [maximum deviation = 0.002 (2) Å] and forms dihedral angles of 4.8 (1) and 39.0 (1)°, respectively, with the benzene rings attached to the N and C atoms. The acenapthylene ring system is approximately planar [maximum deviation = 0.058 (2) Å] and forms dihedral angles of 85.9 (1) and 48.5 (1)°, respectively, with the pyrollothia­zole and chromene ring systems. The mol­ecular conformation is stabilized by three weak intra­molecular C—H...O hydrogen bonds, which generate one S(8) and two S(6) ring motifs. In the crystal, pairs of C—H...O hydrogen bonds link centrosymmetrically related mol­ecules into dimers, generating R₂²(14) ring motifs. The crystal packing also features pairs of C—H...π inter­actions, which link the dimers into a supra­molecular chain along the b axis.

(Z)-3-(3,4-Dimeth­oxy­benzyl­idene)-2,3-dihydro-1,5-benzothia­zepin-4(5H)-one

In the title compound, C₁₈H₁₇NO₃S, the seven-membered thia­zepine ring adopts a slightly distorted sofa conformation. The dihedral angle between the mean plane of the benzothia­zepine ring system and the benzene ring is 5.9 (1)°. The mol­ecular conformation is stabilized by an intra­molecular C—H...S hydrogen bond, which generates an S(7) ring motif. In the crystal, N—H...O and C—H...O hydrogen bonds link inversion-related mol­ecules into dimers, incorporating R₁²(6) and R₂²(8) ring motifs; the acceptor O atom is bifurcated. These dimers are further linked by C—H...O hydrogen bonds, forming supra­molecular tapes running along the a axis. These are connected into the three-dimensional architecture by C—H...π inter­actions.

(Z)-3-(2,4-Dichloro­benz­yl)-1,5-benzo­thia­zepin-4(5H)-one

In the title compound, C₁₆H₁₁Cl₂NOS, the seven-membered thia­zepine ring adopts a distorted twist-boat conformation. The dihedral angle between the mean plane of the benzothia­zepine ring system and the benzene ring is 78.6 (1)°. The mol­ecular conformation is stabilized by a weak intra­molecular C—H...Cl hydrogen bond, which generates an S(5) ring motif. In the crystal, pairs of N—H...O hydrogen bonds link inversion-related mol­ecules into dimers, generating R₂²(8) ring motifs. The crystal packing also features alternating π–π inter­actions between benzothia­zepine benzene rings [inter-centroid distance = 3.740 (3) Å] and dichloro­benzene rings [inter-centroid distance = 3.882 (3) Å] to consolidate a three-dimensional architecture.

3-(4-Methoxybenzyl)-1,5-benzo­thiazepin-4(5H)-one

In the title compound, C₁₇H₁₅NO₂S, the thia­zepine ring adopts a slightly distorted twist-boat conformation. The dihedral angle between the mean plane of the benzo­thia­zepin ring system and the benzene ring is 65.7 (1)°. In the crystal, pairs of N—H...O hydrogen bonds link inversion-related mol­ecules into dimers, generating R₂²(8) ring motifs. These dimers are further linked by C—H...π and π–π inter­actions [inter-centroid distance between the benzene rings of the benzo­thia­zepine unit = 3.656 (3) Å] into a three-dimensional supra­molecular network.

(Z)-3-(3,4-Di­meth­oxy­benz­yl)-1,5-benzo­thia­zepin-4(5H)-one

In the title compound, C₁₈H₁₇NO₃S, the thia­zepine ring adopts a slightly distorted twist-boat conformation. The dihedral angle between the mean plane of the benzo­thia­zepin ring system and the benzene ring is 60.3 (1)°. In the crystal, mol­ecules are linked by two pairs of inversion-related N—H...O and C—H...O hydrogen bonds, generating alternating R₂²(8) and R₂²(6) ring motifs, respectively, in a zigzag supra­molecular chain that runs along the c axis. These chains stack along the a axis via S...C [3.424 (2) Å] contacts. A three-dimensional supra­molecular network is consolidated by C—H...π and π–π inter­actions [inter-centroid distance between di­meth­oxy­benzene rings = 3.815 (1) Å]. The crystal studied was a non-merohedral twin, with a refined value of the minor twin fraction of 0.2477 (6) .