Shui-Ping Deng

2-(4-Methyl­benzo­yl)benzoic acid monohydrate

In the title compound, C15H12O3·H2O, the two rings are oriented at a dihedral angle of 69.12 (3)°. In the crystal structure, intermolecular O—H⋯O hydrogen bonds link the molecules into a three-dimensional framework.

2-Bromo-5-iodo-1,3-dimethyl-benzene.

In the molecule of the title compound, C8H6BrI, the H atoms of methyl groups are disordered; site-occupation factors were fixed at 0.50. The non-H atoms all lie on a crystallographic mirror plane. Weak intramolecular C—H⋯Br hydrogen bonds result in the formation of two non-planar five-membered rings.

(4,6-Dibromo-m-phenyl-enedimethyl-idyne) tetra-acetate.

The title molecule, C16H16Br2O8, lies on a crystallographic twofold axis. Weak intramolecular C—H⋯O hydrogen bonds may, in part, control the conformation of the molecule. In the crystal structure, molecules are connected into a two-dimensional network via weak intermolecular C—H⋯O hydrogen bonds.

2,5-Dibenzoyl­benzene-1,4-diaminium dichloride

The asymmetric unit of the title compound, C20H18N2O2 2+·2Cl−, is composed of one-half of the 2,5-dibenzoylbenzene-1,4-diaminium dication, located on a centre of inversion, and one Cl− ion. The dihedral angle between the central benzene ring and the benzoyl phenyl ring is 53.3 (2)°. In the crystal structure, ions are linked to form a two-dimensional network parallel to the (10) plane by N—H⋯Cl hydrogen bonds.