title: Pyrazino[2,3-b]indolizine-10-carbonitrile.
abstract: In the crystal structure of the title compound, C(11)H(6)N(4), neighbouring mol-ecules are linked into inversion dimers through pairs of weak C-H⋯N hydrogen bonds, forming an R(2) (2)(10) ring motif. The dimers forming this motif are further linked by π-π inter-actions. With respective average deviations from planarity of 0.004 (2) and 0.004 (1) Å, the pyrazino[2,3-β]indolizine and cyano fragment are oriented at 0.8 (1)° to each other. The mean planes of the pyrazino[2,3-b]indolizine skeleton either lie parallel or are inclined at an angle of 28.7 (2)° in the crystal.
authors.affiliation: University of Gdańsk, Faculty of Chemistry, Sobieskiego 18/19, 80-952 Gdańsk, Poland.
authors.forename: Anita
authors.initials: A
authors.lastname: Stefańska
authors.forename: Dorota
authors.initials: D
authors.lastname: Zarzeczańska
authors.forename: Tadeusz
authors.initials: T
authors.lastname: Ossowski
authors.forename: Artur
authors.initials: A
authors.lastname: Sikorski