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

N,N′-Bis(3-chloro­phen­yl)succinamide

The complete molecule of the title compound, C16H14Cl2N2O2, is generated by crystallographic inversion symmetry. The dihedral angle between the benzene ring and the NH—C(O)—C fragment is 32.8 (1)°. In the crystal, the molecules are linked by N—H⋯O hydrogen bonds into [100] chains

2-Chloro-N-(2,4-dimethyl­phen­yl)acetamide

The conformation of the N—H bond in the structure of the title compound, C10H12ClNO, is syn to the ortho methyl group, similar to that observed with respect to the meta methyl group in 2-chloro-N-(3-methyl­phen­yl)acetamide and the ortho-chloro group in 2-chloro-N-(2-chloro­phen­yl)acetamide. The geometric parameters are similar to those of other acetanilides. The mol­ecules are linked into chains through inter­molecular N—H⋯O hydrogen bonds

N-(2,6-Dimethyl­phen­yl)-2-methyl­acetamide

The structure of the title compound (26DMPMA), C11H15NO, is closely related to the side-chain unsubstituted N-(2,6-dimethyl­phen­yl)acetamide and side-chain substituted N-(2,6-dimethyl­phen­yl)-2,2,2-trimethyl­acetamide and 2-chloro-N-(2,6-dimethyl­phen­yl)acetamide, with slightly different bond parameters. The mol­ecules in 26DMPMA are linked into chains through N—H⋯O hydrogen bonding

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

2-Methyl-N-(3-methyl­phen­yl)benzamide

In the structure of the title compound (N3MP2MBA), C15H15NO, the conformation of the N—H bond is anti to the meta-methyl substituent in the aniline ring and that of the C=O bond is syn to the ortho-methyl substituent in the benzoyl ring, while the conformations of the N—H and C=O bonds are anti to each other. The bond parameters in N3MP2MBA are similar to those in 2-methyl-N-phenyl­benzamide, N-(3,4-dimethyl­phen­yl)benzamide and other benzanilides. The amide group, –NHCO–, makes a dihedral angle of 55.2 (7)° with the benzoyl ring, while the dihedral angle between the two benzene rings (benzoyl and aniline) is 36.2 (1)°. N—H⋯O hydrogen bonds give rise to infinite chains running along the b axis of the crystal structure

Ethyl 3-[(3,5-dimethyl­phen­yl)amino­carbon­yl]propanoate

The non-H atoms in the title compound, C14H19NO3, lie on a mirror plane. The amide O and ester carbonyl O atoms are trans to each other. Furthermore, the C=O and O—CH2 bonds of the ester group are syn with respect to each other. In the crystal, mol­ecules are packed into centrosymmetric dimers through inter­molecular N—H⋯O hydrogen bonds

N-(3,5-Dichloro­phen­yl)benzamide

The conformation of the H—N—C=O unit in the title compound, C13H9Cl2NO, is trans, similar to the conformation observed in N-(3-chloro­phen­yl)benzamide, N-(2,3-dichloro­phen­yl)benzamide, N-(2,4-dichloro­phen­yl)benzamide, N-(2,6-dichloro­phen­yl)benzamide and N-(3,4-dichloro­phen­yl)benz­amide. The amide group makes dihedral angles of 14.3 (8) and 44.4 (4)° with the benzoyl and aniline rings, respectively, while the benzoyl and aniline rings form a dihedral angle of 58.3 (1)°. The mol­ecules are linked by N—H⋯O hydrogen bonds into infinite chains running along the c axis

N-Phenyl­formamide

There are two independent mol­ecules in the asymmetric unit of the title compound, C7H7NO. The conformation of the N—H bond in the structure is syn to the C=O bond in one of the mol­ecules and anti in the other. In the crystal, mol­ecules are packed into chains diagonally in the ac plane via N—H⋯O hydrogen bonds

N,N′-Bis[(2-methyl­phenyl)sulfon­yl]adipamide

The asymmetric unit of the title compound, C20H24N2O6S2, comprises one half-mol­ecule, the remaining portion being generated via an inversion centre. The dihedral angle between the plane of the benzene ring and the SO2—NH—C(O)—C—C segment is 89.9 (1)°. In the crystal, inter­molecular N—H⋯O(S) hydrogen bonds link the mol­ecules into infinite chains in [101]