Crystal structure of 2,3-bis-(4-methyl-phen-yl)benzo[ g]quinoxaline

Young-Inn Kim; Seong-Jae Yun; Sung Kwon Kang

doi:10.1107/S2056989018004413

Crystal structure of 2,3-bis-(4-methyl-phen-yl)benzo[ g]quinoxaline

Acta Crystallogr E Crystallogr Commun. 2018 Mar 23;74(Pt 4):548-550. doi: 10.1107/S2056989018004413. eCollection 2018 Apr 1.

Authors

Young-Inn Kim¹, Seong-Jae Yun¹, Sung Kwon Kang²

Affiliations

¹ Department of Chemistry Education and Department of Chemical Materials, Graduate School, Pusan National University, Busan 46241, South Korea.
² Department of Chemistry, Chungnam National University, Daejeon 34134, South Korea.

Abstract

The title compound, C₂₆H₂₀N₂, was obtained during a search for new π-extended ligands with the potential to generate efficient phosphors with iridium(III) for organic light-emitting devices (OLEDs). The benzoquinoxaline ring system is almost planar (r.m.s. deviation = 0.076 Å). A pseudo-twofold rotation axis runs through the midpoints of the C2-C3 and C9-C10 bonds. The two phenyl rings are twisted relative to the benzoquinoxaline ring system, making dihedral angles of 53.91 (4) and 36.86 (6)°. In the crystal, C-H⋯π (arene) inter-actions link the mol-ecules, but no π-π inter-actions between aromatic rings are observed.

Keywords: 2,3-di-p-tolylbenzo[g]quinoxaline; C—H⋯π interaction; N-heterocyclic compound; crystal structure.

Grants and funding

This work was funded by Pusan National University grant .