title: N,N'-(4,5-Dimethyl-1,2-phenyl-ene)bis-(pyridine-2-carboxamide).
abstract: In the title compound, C(20)H(18)N(4)O(2), the dihedral angles between the central benzene ring and the pyridine rings are 57.55 (6) and 22.05 (8)°. The mol-ecular conformation is stabilized by intra-molecular N-H⋯N inter-actions and in the crystal structure an inter-molecular asymmetric cyclic hydrogen-bonding association involving both amide N-H donors and a common amide O-atom acceptor gives a chain extending along the c axis.
authors.affiliation: Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein 9300,  South Africa.
authors.forename: Phillipus C W
authors.initials: PC
authors.lastname: Van der Berg
authors.forename: Hendrik G
authors.initials: HG
authors.lastname: Visser
authors.forename: Andreas
authors.initials: A
authors.lastname: Roodt
authors.forename: Theunis J
authors.initials: TJ
authors.lastname: Muller