2,2′,5,5′-Tetra­chloro-N,N′-diethyl-N,N′-[benzene-1,3-diylbis(methyl­ene)]dibenzene­sulfonamide

In the title compound, C₂₄H₂₄Cl₄N₂O₄S₂, the dihedral angles between the central benzene ring and the pendant rings are 58.09 (10) and 62.59 (10)°. The dihedral angle between the pendant rings is 81.64 (9)°. Both sulfonamide groups lie to the same side of the central ring but the C—S—N—C torsion angles [73.09 (16) and −117.35 (14)] and S—N—C—C torsion angles [−143.80 (14) and −111.45 (16)°] differ significantly for the two pendant chains. The N atoms are close to planar (bond angle sums = 356.4 and 359.5°). In the crystal, weak C—H...O and C—H...Cl inter­actions link the mol­ecules.

Bis(methacrylato-κO)bis­(2,4,6-trimethyl­pyridine-κN)copper(II)

In the monomeric title complex, [Cu(C₄H₅O₂)₂(C₈H₁₁N)₂], the Cu^II atom lies on a centre of inversion. Its coordination by two substituted pyridine ligands and two carboxyl­ate anions leads to a slightly distorted trans-CuN₂O₂ square-planar geometry. The dihedral angle between the mean planes of the pyridine (py) ring and the carboxyl­ate group is 74.71 (7)°. The dihedral angles between the planar CuN₂O₂ core and the py ring and carboxyl­ate plane are 67.72 (5) and 89.95 (5)°, respectively. Based on the refined C=C and C—C bond lengths, the terminal =CH₂ and –CH₃ groups of the carboxyl­ate anion may be disordered, but the disorder could not be resolved in the present experiment. Several intra­molecular C—H...O inter­actions occur. In the crystal, mol­ecules are linked by weak C—H...O hydrogen bonds, generating chains propagating in [100].

1-[Amino­(4-chloro­phen­yl)meth­yl]-6-bromo­naphthalen-2-ol

In the title compound, C₁₇H₁₃BrClNO, the dihedral angle between the naphthol ring system and the chloro­benzene ring is 76.59 (11)°. This twisted conformation is supported by an intra­molecular O—H...N hydrogen bond. In the crystal, [100] chains arise, with adjacent mol­ecules linked by an N—H...O hydrogen bond, a C—H...π inter­action and an aromatic π–π stacking contact [centroid-to-centroid separation = 3.783 (2) Å]. Weak C—H...O inter­actions also occur.

(E)-1-(2,5-Dichloro­thio­phen-3-yl)ethan­one [8-(trifluoro­meth­yl)quinolin-4-yl]hydrazone

In the title compound, C₁₆H₁₀Cl₂F₃N₃S, the dihedral angle between the quinoline and thio­phene ring systems is 4.94 (10)°. The NH group of the hydrazone moiety does not form a hydrogen bond, due to a steric crowding. In the crystal, the thio­phene ring takes part in weak π–π stacking inter­actions with the pyridine ring [centroid-to-centroid separation = 3.7553 (19) Å and inter­planar angle = 5.48 (12)°] and the benzene ring [3.7927 (19) Å and 4.58 (12)°]. Together, these lead to [100] stacks of mol­ecules in an alternating head-to-tail arrangement, with two π–π stacking contacts between each adjacent pair.

N,N′-[1,3-Phenyl­enebis(methyl­ene)]di-p-toluenesulfonamide

In the title compound, C₂₂H₂₄N₂O₄S₂, the dihedral angles between the central benzene ring and the pendant rings are 66.96 (13) and 69.37 (13)°. The torsion angles for the C—N—S—C fragments are −68.5 (3) and −72.6 (3)°. In the crystal, mol­ecules are linked by N—H...O hydrogen bonds to generate infinite (001) sheets containing R₄⁴(28) loops. A weak aromatic π–π stacking contact between one of the terminal benzene rings and its inversion-related partner is also observed [centroid-to-centroid separation = 3.796 (2) Å and slippage = 1.581 Å], as are two possible C—H...π contacts.

N-[4-(4-Chloro­benzene­sulfonamido)­phenyl­sulfon­yl]acetamide

In the title compound, C₁₄H₁₃ClN₂O₅S₂, the dihedral angles between the central benzene ring and the pendant chloro­benzene ring and the N-acetyl group are 82.35 (5) and 79.71 (6)°, respectively, and the overall conformation of the mol­ecule approximates to a U shape. Both the C—S—N—C conformations are gauche, but with opposite senses [torsion angles = −59.29 (15) and 63.68 (16)°]. An intra­molecular C—H...O inter­action generates an S(6) ring. In the crystal, inversion dimers linked by pairs of N—H...O hydrogen bonds generate R₂²(20) loops. A second N—H...O hydrogen bond links the dimers into (101) layers.

3-(1H-Indol-3-yl)-2-(2-nitro­benzene­sulfonamido)­propanoic acid including an unknown solvate

In the title compound, C₁₇H₁₅N₃O₆S, which crystallized with highly disordered methanol and/or water solvent mol­ecules, the dihedral angle between the the indole and benzene ring systems is 5.3 (2)°, which allows for the formation of intra­molecular π–π stacking inter­actions [centroid–centroid separations = 3.641 (3) and 3.694 (3) Å] and an approximate overall U-shape for the mol­ecule. In the crystal, dimers linked by pairs of N_s—H...O_c (s = sulfonamide and c = carboxyl­ate) hydrogen bonds generate R₂²(10) loops, whereas N_i—H...π (i = indole) inter­actions lead to chains propagating in [100] or [010]. Together, these lead to a three-dimensional network in which the solvent voids are present as inter­secting (two-dimensional) systems of [100] and [010] channels. The title compound was found to contain a heavily disordered solvent mol­ecule, which could be methanol or water or a mixture of the two. Due to its uncertain nature and the unresolvable disorder, the data were processed with the SQUEEZE option in PLATON [Spek (2009). Acta Cryst. D65, 148–155], which revealed 877.8 ų of solvent-accessible volume per unit cell and 126 electron-units of scattering density or 109.7 ų (16 electron units) per organic mol­ecule.. This was not included in the calculations of overall formula weight, density and absorption coefficient.

N-(2,3-Dihydro-1,4-benzodioxin-6-yl)-4-fluoro­benzene­sulfonamide

In the title compound, C₁₄H₁₂FNO₄S, the dihedral angle between the aromatic rings is 50.26 (9)° and the C—S—N—C bond adopts a gauche conformation [torsion angle = −68.12 (15)°]. The dihydro­dioxine ring is disordered over two orientations, which both approximate to half-chairs, in a 0.880 (7):0.120 (7) ratio. In the crystal, N—H...O hydrogen bonds link the mol­ecules into C(4) chains propagating in [100]. Weak C—H...O and C—H...F inter­actions consolidate the packing.

2,5-Dichloro-N-(3-methyl­phen­yl)benzenesulfonamide

In the title compound, C₁₃H₁₁Cl₂NO₂S, the dihedral angle between the aromatic rings is 76.62 (10)° and the C—S—N—C linkage between the rings adopts a gauche conformation [torsion angle = −51.4 (2)°]. A weak intra­molecular C—H...O inter­action closes an S(6) ring. In the crystal, inversion dimers linked by pairs of N—H...O hydrogen bonds generate R₂²(8) loops.

2-{[2-(1-Methyl-2,2-dioxo-3,4-dihydro-1H-2λ⁶,1-benzothia­zin-4-yl­idene)hydrazin-1-yl­idene]meth­yl}phenol

In the title compound, C₁₆H₁₅N₃O₃S, the dihedral angle between the aromatic rings is 8.18 (11)° and the C=N—N=C torsion angle is 178.59 (14)°. The conformation of the thia­zine ring is an envelope, with the S atom displaced by 0.8157 (18) Å from the mean plane of the other five atoms (r.m.s. deviation = 0.045 Å). An intra­molecular O—H...N hydrogen bond closes an S(6) ring. In the crystal, weak C—H...O inter­actions link the mol­ecules, with all three O atoms acting as acceptors.

6-Bromo-1-methyl-4-[2-(4-nitro­benzyl­idene)hydrazin-1-yl­idene]-2,2-dioxo-3,4-dihydro-1H-2λ⁶,1-benzothia­zine

In the title compound, C₁₆H₁₃BrN₄O₄S, the dihedral angle between the aromatic rings is 4.1 (2)° and the C=N—N=C torsion angle is 175.5 (3)°. The nitro group is almost coplanar with the benzene ring to which it is attached [dihedral angle = 2.9 (7)°]. The thia­zine ring has an S-envelope conformation with the S atom displaced by 0.819 (3) Å from the mean plane of the other five atoms (r.m.s. deviation = 0.017 Å). In the crystal, C—H...O inter­actions link the mol­ecules and weak aromatic π–π stacking [centroid–centroid separation = 3.874 (2) Å] is also observed.

2,5-Dichloro-N-(2,3-dimethyl­phen­yl)benzene­sulfonamide

In the title compound, C₁₄H₁₃Cl₂NO₂S, the dihedral angle between the aromatic rings is 62.21 (7)° and the C—S—N—C group adopts a gauche conformation [torsion angle = 60.22 (17)°]. In the crystal, N—H...O hydrogen bonds link the mol­ecules into C(4) chains propagating in [010]. A short inter­molecular Cl...O contact of 3.1115 (17) Å is seen.

6-Bromo-4-[2-(4-fluoro­benzyl­idene)hydrazin-1-yl­idene]-1-methyl-3,4-dihydro-1H-2λ⁶,1-benzothia­zine-2,2-dione

In the title compound, C₁₆H₁₃BrFN₃O₂S, the dihedral angle between the aromatic rings is 2.55 (19)° and the C=N—N=C torsion angle is 178.9 (3)°. The conformation of the thia­zine ring is an envelope, with the S atom displaced by −0.811 (3) Å from the mean plane of the other five atoms (r.m.s. deviation = 0.042 Å). In the crystal, C—H...O inter­actions link the mol­ecules and weak aromatic π–π stacking between the fluoro­benzene and bromo­benzene rings [centroid–centroid separation = 3.720 (2) Å and inter­planar angle = 2.6 (2)°] is also observed.

(4Z)-1-Methyl-4-[(2E)-2-(4-methyl­benzyl­idene)hydrazin-1-yl­idene]-3,4-dihydro-1H-2λ⁶,1-benzothia­zine-2,2-dione

In the title compound, C₁₇H₁₇N₃O₂S, the dihedral angle between the aromatic rings is 6.3 (5)° and the C=N—N=C group is statistically planar [torsion angle = 179.8 (8)°]. The conformation of the thia­zine ring is an envelope, with the S atom displaced by 0.823 (9) Å from the mean plane of the other five atoms (r.m.s. deviation = 0.012 Å). In the crystal, C—H...O inter­actions link the mol­ecules into C(5) chains propagating along [101]. The chains are consolidated by weak aromatic π–π stacking between the benzene and toluene rings [centroid-to-centroid separation = 3.826 (5) Å and inter­planar angle = 6.3 (4)°].

N-(2,3-Dimethyl­phen­yl)-4-fluoro-N-[(4-fluoro­phen­yl)sulfon­yl]benzene­sulfonamide

In the title compound, C₂₀H₁₇F₂NO₄S₂, the dihedral angles between the o-xylene ring and the fluoro­benzene rings are 31.7 (1) and 32.8 (1)°, and the dihedral angle between the fluoro­benzene rings is 50.9 (1)°. The C—N—S—C torsion angles are 76.7 (2) and 101.8 (2)°. In the crystal, mol­ecules are connected by C—H...O inter­actions into sheets in the ab plane.

N-(2,3-Dimethyl­phen­yl)-4-methyl-N-(4-methyl­phenyl­sulfon­yl)benzene­sulfonamide

In the title compound, C₂₂H₂₃NO₄S₂, the dihedral angles between the dimethyl­phenyl ring and the two methyl­phenyl rings are 41.19 (15) and 20.50 (17)°; the dihedral angle between the methyl­phenyl rings is 48.11 (14)°. The C—N—S—C torsion angles are −87.6 (2) and 77.43 (18)°. The only possible directional inter­actions in the crystal are very weak C—H...π inter­actions and very weak π–π stacking between parallel methyl­phenyl rings [centroid-to-centroid separation = 4.010 (2) Å and slippage = 1.987 Å].