N,N′-Bis(4-chloro­phen­yl)maleamide

In the crystal of the title compound, C16H12Cl2N2O2, the two C=O groups are anti to each other, while one of them is syn and the other is anti to their adjacent C—H bonds. The two benzene rings are oriented at an inter­planar angle of 56.4 (1)°, while the dihedral angles between the central amide group (N–C–C–C–C–N) and these rings are 3.6 (1) and 54.1 (1)°. An intra­molecular N—H⋯O hydrogen bond occurs. In the crystal, inter­molecular N—H⋯O hydrogen bonds link the mol­ecules into infinite chains along the a axis

4-Chloro-N-(2-chloro­phen­yl)benzene­sulfonamide

In the crystal structure of the title compound, C12H9Cl2NO2S, the N—C bond in the C—SO2—NH—C segment has gauche torsions with respect to the S=O bonds. The mol­ecule is twisted at the S atom with an C—SO2—NH—C torsion angle of 57.6 (3)°. The N—H bond is syn to the ortho-chloro group in the anilino benzene ring. The two benzene rings are tilted relative to each other by 84.7 (1)°. The crystal structure features inversion dimers linked by N—H⋯O(S) hydrogen bonds. An intra­molecular N—H⋯Cl hydrogen bond is also observed

Sodium N-bromo-2-chloro­benzene­sulfonamidate sesquihydrate

In the title compound, Na+·C6H4BrClNO2S−·1.5H2O, one water mol­ecule has crystallographically imposed twofold symmetry. The Na+ cation shows a pseudo-octa­hedral coordination provided by three O atoms of water mol­ecules and three sulfonyl O atoms of different N-bromo-2-chloro­benzene­sulfonamidate anions. The S—N distance of 1.579 (6) Å is consistent with an S=N double-bond character. The crystal structure is stabilized by O—H⋯Br, O—H⋯N and O—H⋯O hydrogen bonds

N-(2,5-Dichloro­phen­yl)-4-methyl­benzene­sulfonamide

In the title compound, C13H11Cl2NO2S, the N—C bond in the C—SO2—NH—C segment has gauche torsion angles with respect to the S=O bonds. The mol­ecule is bent at the S atom with an C—SO2—NH—C torsion angle of 62.1 (2)°. Furthermore, the conformation of the N—H bond is syn to the ortho-chloro group in the adjacent benzene ring. The benzene rings are tilted by 67.8 (1)° relative to each other. The crystal structure features dimers linked by N—H⋯O hydrogen bonds. An intra­molecular N—H⋯Cl hydrogen bond is also observed

4-Methyl­phenyl 4-chloro­benzoate

The crystal structure of the title compound, C14H11ClO2, is similar to those of phenyl benzoate, 4-methyl­phenyl benzoate and 4-methyl­phenyl 4-methyl­benzoate. The dihedral angle between the phenyl and benzene rings is 51.86 (4)°. The mol­ecules crystallize in planes parallel to (02)

4-Chloro-N-(3-methyl­phen­yl)benzene­sulfonamide

In the crystal of the title compound, C13H12ClNO2S, the N—H bond is anti to the meta-methyl group in the aniline ring. The C—SO2—NH—C torsion angle is −57.6 (2)°. The sulfonyl and aniline benzene rings are tilted relative to each other by 84.7 (1)°. The crystal structure features inversion-related dimers linked by pairs of N—H⋯O hydrogen bonds

3,5-Dichloro­phenyl 4-methyl­benzoate

The structure of the title compound, C14H10Cl2O2, resembles those of 3-chloro­phenyl 4-methyl­benzoate, 2,6-dichloro­phenyl 4-methyl­benzoate and 2,4-dichloro­phenyl 4-methyl­benzoate, with similar bond parameters. The dihedral angle between the benzene and benzoyl rings is 48.81 (6)°

N-(2-Methyl­phenyl­sulfon­yl)acetamide

In the mol­ecular structure of the title compound, C9H11NO3S, the N—H and C=O bonds are anti to each other, while the amide H atom is syn with respect to the ortho-methyl group in the benzene ring. The C—S—N—C torsion angle is −58.2 (2)°, indicating a twist in the mol­ecule. In the crystal, N—H⋯O hydrogen bonds link the mol­ecules into chains along the c axis

Potassium N,4-dichloro­benzene­sulfonamidate monohydrate

The structure of the title salt hydrate, K+·C6H4Cl2NO2S−·H2O, shows each of the sulfonyl O and water O atoms to be bidentate bridging. The hepta­coordinated K+ cation is connected to two water O atoms, four sulfonyl O atoms and one Cl atom. The crystal structure comprises sheets in the bc plane which are further stabilized by O—H⋯N hydrogen bonds