2-(7,8-Diphenyl-1H-imidazo[4,5-f]quinoxalin-2-yl)phenol methanol disolvate

Hoong Kun Fun, Reza Kia, Paul R. Raithby

Research output: Contribution to journalArticlepeer-review


The title compound, C27H18N4O·2CH4O, is a unsymmetrically substituted quinoxaline. An intra-molecular O - H⋯N hydrogen bond involving the hydr-oxy and imino groups generates an S(6) ring motif. Inter-molecular C - H⋯O and N - H⋯O hydrogen bonds form an R 2 1(7) ring motif involving a methanol O atom and two H atoms of the imidazole and benzene rings, respectively. The latter links neighbouring mol-ecules into one-dimensional extended chains along the a axis. The two benzene rings are inclined towards each other, as indicated by the dihedral angle of 52.13 (10)°. The phenol ring is almost coplanar with the basic quinoxaline unit, making a dihedral angle of 2.43 (6)°. The short distances between the centroids of the five- and six-membered rings prove the existence of π-π inter-actions [centroid-centroid distances = 3.5234 (9)-3.7885 (10) Å]. The crystal structure is stabilized by intra-molecular O - H⋯N, inter-molecular O - H⋯O, N - H⋯O and C - H⋯O ( 2) hydrogen bonds and weak inter-molecular C - H⋯π and π-π inter-actions.

Original languageEnglish
Pages (from-to)o1741-o1742
JournalActa Crystallographica Section E: Structure Reports Online
Issue number9
Publication statusPublished - 2008

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics


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