The asymmetric unit of the title compound, C(20)H(18)N(2)O(2) (2+)·2Cl(-), is composed of one-half of the 2,5-dibenzoyl-benzene-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) p...

Molecular oxygen can replace sacrificial olefins as the hydrogen acceptor in the palladium trifluoroacetate catalyzed dehydrogenation of cyclohexene and related cyclic olefins into aromatics. One of the major drawbacks of the homogeneous system is the tendency of the palladium trifluoroacetate to precipitate as palladium(0) at elevated temperatures. The use of better ligands affords catalysts t...

In the title compound, C(4)H(14)N(2) (+)·2C(9)H(7)O(4) (-)·2H(2)O, the butane-1,4-diaminium cation lies on an inversion center. In the crystal, inter-molecular N-H⋯O and O-H⋯O hydrogen bonds link the components into layers parallel to (100). Addtional stabilization within these layers is provided by weak inter-molecular C-H⋯O hydrogen bonds.

In the title salt, C2H10N2 (2+)·2C14H10NO3 (-), the ethyl-ene-diaminium dication lies on an inversion centre. In the anion, the benzene rings make a dihedral angle of 33.87 (9)° and intramolecular N-H⋯O and C-H⋯O hydrogen bonds occur. All the amino H atoms are involved in N-H⋯O hydrogen bonds. These hydrogen bonds link the ionic units into a three-dimensional network. In addition, the crystal s...