Research Article: 2-Phenyl­thieno[2,3-b]quinoxaline

Date Published: February 01, 2012

Publisher: International Union of Crystallography

Author(s): Youssef Ramli, Hafid Zouihri, Mohamed Azougagh, Ahmed Moussaif, El Mokhtar Essassi.


The title compound, C16H10N2S, is almost planar (r.m.s. deviation for all non-H atoms = 0.080 Å). The dihedral angle between the three fused-ring system and the phenyl ring is 9.26 (3)°. The S atom and the opposite C atom of the thio­phene ring are mutually disordered with an occupancy ratio of 0.7706 (19):0.2294 (19).

Partial Text

For a related structure, see: Ramli et al. (2011 ▶). For the biological activity of quinoxaline derivatives, see: Kleim et al. (1995 ▶). For their anti­tumour and anti­tuberculous properties, see: Abasolo et al. (1987 ▶); Rodrigo et al. (2002 ▶) and for their anti­fungal, herbicidal, anti­dyslipidemic and anti­oxidative activity, see: Jampilek et al. (2005 ▶); Sashidhara et al. (2009 ▶); Watkins et al. (2009 ▶).