title: 2,3-Bis(thio-phen-2-yl)pyrazine-[2,3-f][1,10]phenanthroline.
abstract: The mol-ecule of the title compound, C(22)H(12)N(4)S(2), shows no crystallographic symmetry. The thiophene rings form different dihedral angles [40.15 (9) and 15.43 (10)°] with the pyrazine ring. A strong π-π stacking inter-action occurs between adjacent pyrazine-[2,3-f][1,10]phenanthroline units with an inter-planar distance of 3.4352 (16) Å.
authors.affiliation: School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu Province 214122, People's Republic of China, and Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, 345 Lingling Road, Shanghai 200032,  People's Republic of China.
authors.forename: Chang-Ge
authors.initials: CG
authors.lastname: Zheng
authors.forename: Jun
authors.initials: J
authors.lastname: Kong
authors.forename: Peng
authors.initials: P
authors.lastname: Zhang
authors.forename: Wen-Xian
authors.initials: WX
authors.lastname: Dong