title: 1,2,4,5-Tetra-fluoro-3,6-diiodo-benzene-2,3-bis-(pyridin-2-yl)pyrazine (1/1).
abstract: The components of the title 1:1 co-crystal, C(14)H(10)N(4)·C(6)F(4)I(2), are connected via an N⋯I [2.959 (4) Å] halogen bond, in which the N atom is part of the relatively electron-rich pyrazine ring. The C(6)F(4)I(2) mol-ecule is almost planar [r.m.s. deviation = 0.038 Å] but there are significant twists in the pyrazine derivative, as seen in the dihedral angles [31.3 (2) and 54.6 (2)°] formed between the pendant pyridyl rings and the central pyrazine ring. The bimolecular aggregates are sustained in the crystal by C-H⋯F and π-π inter-actions [ring centroid(pyrid-yl)-ring centroid(benzene) = 3.678 (3) Å].
authors: Hadi D
authors: HD
authors: Arman
authors: Trupta
authors: T
authors: Kaulgud
authors: Edward R T
authors: ER
authors: Tiekink
references: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references: 18156677
references: Acta Crystallogr Sect E Struct Rep Online. 2010 Sep 30;66(Pt 10):o2683
references: 21587651