N-(2,5-Dichloro­phen­yl)maleamic acid

The asymmetric unit of the title compound, C10H7Cl2NO3, contains two independent mol­ecules. The mol­ecular conformation of each maleamic unit is stabilized by an intra­molecular O—H⋯Ocarbon­yl hydrogen bond owing to the anti disposition of the participating entities. The mean planes through the benzene ring and the amido group are inclined at angles of 45.7 (1) and 40.8 (1)° in the two mol­ecules. In the crystal, the independent mol­ecules self-associate via N—H⋯O hydrogen bonds into zigzag ribbons propagating along the a axis. The ribbons are weakly coupled by C—H⋯π and C—H⋯O inter­actions

2-Chloro-N-phenyl­acetamide

In the title compound, C8H8ClNO, the conformations of the N—H and C=O bonds are anti to each other, but the C—Cl and C=O bonds in the side chain are syn. The mol­ecules are linked by N—H⋯O hydrogen bonds into infinite chains running in the [101] direction

N-(3-Chloro­phen­yl)maleamic acid

In the title compound, C10H8ClNO3, the molecular conformation is stabilized by two intra­molecular hydrogen bonds. The first is a short O—H⋯O hydrogen bond within the maleamic acid unit and the second is a C—H⋯O hydrogen bond which connects the amide group with the phenyl ring. The maleamic acid unit is essentially planar, with an r.m.s. deviation of 0.044 Å, and makes a dihedral angle of 15.2 (1)° with the phenyl ring. In the crystal, inter­molecular N—H⋯O hydrogen bonds link the mol­ecules into C(7) chains running [010]

N-(2,4,6-Trimethyl­phen­yl)maleamic acid

The mol­ecular structure of the title compound, C13H15NO3, is stabilized by a short intra­molecular O—H⋯O hydrogen bond within the maleamic unit. In the crystal, inter­molecular N—H⋯O hydrogen bonds link mol­ecules into zigzag chains propagating in [010]

N-(3,4-Dimethyl­phen­yl)maleamic acid

The title compound, C12H13NO3, crystallizes with four independent mol­ecules in the asymmetric unit. The N—H bond and the C=O bond in the amide segment are anti to each other. The C=C double bond is cis configured and an intra­molecular O—H⋯O hydrogen bond is formed in each molecule. The mean planes through the aromatic ring and the amide group –NHCO– are inclined at angles of 17.4 (3), 20.8 (2), 16.2 (2) and 11.2 (3)° in the four mol­ecules. In the crystal, inter­molecular N—H⋯O hydrogen bonds link the mol­ecules into ribbons along the b axis

N-(2,6-Dichloro­phen­yl)-3-methyl­benzamide

In the mol­ecular structure of the title compound, C14H11Cl2NO, the two aromatic rings form a dihedral angle of 70.9 (1)°. The central amido group –NH—C(=O)– makes a dihedral angle of 26.6 (2)° with the methyl­phenyl ring and 82.5 (1)° with the dichloro­phenyl ring. Inter­molecular N—H⋯O hydrogen bonds link the mol­ecules into chains running along the c axis of the crystal

N-(3,4-Dimethyl­phen­yl)-4-methyl­benzamide

The title compound, C16H17NO, crystallizes with two mol­ecules in the asymmetric unit. The conformation of the N—H bond is anti to the meta-methyl substituent in the aniline ring in the first mol­ecule and syn in the second mol­ecule. The dihedral angles between the two benzene rings are 52.6 (1) and 10.5 (1)° in the first and second mol­ecules, respectively. Inter­molecular N—H⋯O hydrogen bonds link the mol­ecules into chains running along the b axis of the crystal

N,N′-Bis(2-chloro­phen­yl)propane­diamide

The crystal structure of the title compound, C15H12Cl2N2O2, contains three intramolecular hydrogen bonds; two C—H⋯O and a nonclassical N—H⋯Cl. The structure is further stabilized by intermolecular N—H⋯O hydrogen bonds and C—H⋯π interactions, resulting in a three-dimensional network. The two benzene rings make an interplanar angle of 58.0 (1)°

Phenyl 4-methyl­benzoate

The structure of the title compound, C14H12O2, resembles those of phenyl benzoate and 4-methyl­phenyl benzoate, with similar bond parameters. The two aromatic rings make a dihedral angle of 76.0 (1)°. The plane of the central —C(=O)—O— group is twisted by 9.4 (2)° out of the plane of the benzoyl ring, and by 83.3 (1)° out of the plane of the phenyl ring. The crystal structure exhibits weak parallel stacking of the benzoyl rings, with an inter­planar distance of 3.65 Å and an offset of 1.84 Å. The methyl group shows orientational disorder

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

The mol­ecular structure of the title compound, C15H15NO, involves an intra­molecular C—H⋯O hydrogen bond. The central amide group –NH—C(=O)– is twisted by 37.95 (12)° out of the meta-substituted benzoyl ring and by 37.88 (12)° out of the ortho-substituted aniline ring. The two benzene rings are inclined to one another at only 4.2 (1)° having an inter­planar spacing of ca 0.90 Å. The crystal structure is stabilized by inter­molecular N—H⋯O hydrogen bonds, which link the mol­ecules into chains running along the b axis. A weak inter­molecular C—H⋯π inter­action is also present