B.T. Gowda

N-Benzoyl-2-chloro-benzene-sulfonamide.

In the crystal structure of the title compound, C13H10ClNO3S, the conformation of the of the N—H bond in the C—SO2—NH—C(O) segment is anti to the C=O bond. The dihedral angle between the two benzene rings is 73.3 (1)°. In the crystal, inversion dimers linked by pairs of N—H⋯O hydrogen bonds occur.

N-(2,5-Dimethyl-phen-yl)benzene-sulfonamide.

In the crystal structure of the title compound, C14H15NO2S, the N—H bond is trans to one of the S=O double bonds, similar to what is observed in N-(2-methylphenyl)benzenesulfonamide and other aryl sulfonamides. The two aromatic rings enclose a dihedral angle of 44.9 (1)°. The molecules are connected by intermolecular N—H⋯O hydrogen bonds into chains running along the a axis. An intermolecular C—H⋯O hydrogen bond is also present.

N-Benzoyl-4-chloro-benzene-sulfonamide.

The asymmetric unit of the title compound, C13H10ClNO3S, contains two independent molecules. The molecules have C—S—N—C torsion angles of −70.0 (2) and 61.3 (2)° for molecules 1 and 2, respectively. The dihedral angles between the sulfonyl benzene rings and the –SO2—NH—C—O segments are 72.0 (1) and 77.3 (1)° for molecules 1 and 2, respectively, and the dihedral angles between the sulfonyl and the benzoyl benzene rings are 62.8 (1) and 78.6 (1)°, respectively. In the crystal, molecules 1 and 2 are linked by pairs of N—H⋯O hydrogen bonds, forming inversion dimers.

N-(3-Chloro­phen­yl)benzene­sulfonamide

In the crystal structure of the title compound, C12H10ClNO2S, the N—H bond is trans to one of the S=O bonds. The two aromatic rings form a dihedral angle of 65.4 (1)°, compared with a value of 49.1 (1)° in N-(2-chlorophenyl)-benzenesulfonamide. The molecules are connected by intermolecular N—H⋯O hydrogen bonds into chains running along the b axis.

N-Benzoyl-2-methyl­benzene­sulfonamide

In the title compound, C14H13NO3S, the conformation of the N—H bond in the C—SO2—NH—C(O) segment is anti to the C=O bond. The tolyl and benzoyl groups are twisted about the S—N bond, with a C—S—N—C torsion angle of 68.8 (4)°. The dihedral angle between the sulfonyl and the benzoyl benzene rings is 73.9 (1)°. In the crystal, the molecules are linked into C(4) chains along the c axis by N—H⋯O hydrogen bonds.

N-Benzo-ylbenzene-sulfonamide.

In the crystal structure of the title compound, C13H11NO3S, the conformation of the N—H bond in the C—SO2—NH—C(O)—C segment is anti to the C=O bond. The molecule is twisted at theN atom with a dihedral angle of 86.5(1)° between the sulfonyl benzene ring and the —SO2—NH—C=O segment. Furthermore, the dihedral angle between the two benzene rings is 80.3(1)°. The crystal structure features inversion-related dimers linked by pairs of N—H⋯O(S) hydrogen bonds.

2-Methyl-N-phenyl­benzamide

In the structure of the title compound (NP2MBA), C14H13NO, the conformation of the C—O bond is syn to the ortho-methyl substituent in the benzoyl phenyl ring, while the N—H bond is anti to the ortho-methyl substituent. The structure of NP2MBA closely resembles that of 2-chloro-N-phenylbenzamide, with similar bond parameters. The dihedral angle between the phenyl and benzoyl rings is 88.05 (5)°. Molecules are linked into a chain through N—H⋯O hydrogen bonding.

N,N′-Bis(2-methyl­phen­yl)succinamide

In the title compound, C18H20N2O2, the conformations of the N—H and C=O bonds in the C—NH—C(O)—C segments are anti to each other and the amide O atom is anti to the H atoms attached to the adjacent C atoms. Further, the conformations of the N—H bonds in the amide fragments are anti to the ortho-methyl groups in the adjacent benzene rings. The complete molecule is generated by inversion symmetry. The dihedral angle between the benzene ring and the NH—C(O)—CH2 segment in the two halves of the molecule is 62.1 (2)°. In the crystal, N—H⋯O intermolecular hydrogen bonds link the molecules into sheet-like infinite chains along the a axis.

2,4-Dimethyl-N-phenyl-benzene-sulfonamide.

The asymmetric unit of the crystal structure of the title compound, C14H15NO2S, contains two molecules. The conformations of the N—C bonds in the C—SO2—NH—C segments of the structure have trans and gauche torsion angles with the S=O bonds. Furthermore, the torsion angles of the C—SO2—NH—C groups in the two molecules are 46.1 (3) (glide image of molecule 1) and 47.7 (3)° (molecule 2). The ortho-methyl groups in the sulfonyl benzene ring are oriented away from the S=O bonds. The two benzene rings are tilted relative to each other by 67.5 (1) and 72.9 (1)° in the two molecules. N—H⋯O and C—H⋯O hydrogen bonds pack the molecules into one-dimensional chains in different directions, resulting in a two-dimensional network.

Guanidinium tetra-bromidomercurate(II).

The Hg atoms in the crystal structure of the title compound, (CH6N3)2[HgBr4], are tetrahedrally coordinated by four Br atoms and the resulting [HgBr4]2− tetrahedral ions are linked to the [C(NH2)3]+ ions by bromine–hydrogen bonds, forming a three-dimensional network. In the structure, the anions are located on special positions. The two different Hg⋯Br distances of 2.664 (1) and 2.559 (1) Å observed in the tetrabromidomercurate unit are due to the connection of Br atoms to different number of H atoms.