title: 2,3-Bis(4-ethoxy-phen-yl)quinoxaline.
abstract: The title compound, C(24)H(22)N(2)O(2), was prepared by condensation of 1,2-bis-(4-ethoxy-phen-yl)ethane-1,2-dione and 1,2-diamino-benzene. The asymmetric unit contains one half-mol-ecule, close to a twofold axis. The plane of the quinoxaline ring is twisted with respect to the planes of the two ethoxy-phenyl ring systems, exhibiting dihedral angles of 39.95 (9)°. The crystal packing is dominated by weak C-H⋯π inter-actions. No classical hydrogen bonds or stacking inter-actions are observed.
authors.affiliation: Department of Chemistry, Zhejiang University, Hangzhou 310027, People's Republic of China.
authors.forename: Ping-Ping
authors.initials: PP
authors.lastname: Ye
authors.forename: Cai-Li
authors.initials: CL
authors.lastname: Zhang
authors.forename: Zhi-Qiang
authors.initials: ZQ
authors.lastname: Du