Crystal structure of 2,3′-bipyridine-2′,6′-dicarbonitrile

초록

The title compound, C₁₂ H₆ N₄, crystallizes with four independent molecules (A, B, C and D) in the asymmetric unit. The dihedral angles between the two pyridine rings in each molecule are 25.25 (8)° in A, 5.51 (9)° in B, 11.11 (9)° in C and 16.24 (8)° in D. In the crystal, molecules A and B are linked by C-H..N hydrogen bonds to form layers extending parallel to the ab plane, while molecules C and D are linked by C-H..N hydrogen bonds forming-C-D-C-D-chains propagating along the b-axis direction. The layers and the chains are stacked alternately along the c axis through offset π-π and C=N..π [N-to-pyridine-centroid distance = 3.882 (2) Å] interactions, resulting in the formation of a supramolecular framework. © 2018 Jung et al.

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