title: 10,11,12,13-Tetrahydro-4,5,9,14-tetra-azadibenz[a,c]anthracene-benzene-1,4-dicarboxylic acid (2/1).
abstract: In the title adduct, 2C(18)H(14)N(4)·C(8)H(6)O(4), the centrosymmetric 1,4-benzene-dicarboxylic acid mol-ecule makes two O-H⋯·N hydrogen bonds to adjacent 10,11,12,13-tetra-hydro-4,5,9,14-tetra-azadibenzo[a,c]anthracene (TTBT) mol-ecules. Aromatic π-π stacking inter-actions occur between TTBT rings [centroid-centroid distance = 3.570 (3) Å], leading to a two-dimensional supra-molecular structure in the crystal.
authors.affiliation: Department of Chemistry, Jilin Normal University, Siping 136000, People's Republic of China.
authors.forename: Chun-Bo
authors.initials: CB
authors.lastname: Liu
authors.forename: Jian
authors.initials: J
authors.lastname: Wang
authors.forename: Xiu-Ying
authors.initials: XY
authors.lastname: Li
authors.forename: Guang-Bo
authors.initials: GB
authors.lastname: Che
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu