Powder diffraction study of 1,2:3,4-dibenzanthracene

Fernandes, P.; Florence, A.; Shankland, K.; David, W.I.F.

doi:10.1107/S1600536805012171

Acta Crystallographica Section E
Acta Crystallographica
Section E CRYSTALLOGRAPHIC COMMUNICATIONS

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Figure 3
Top: view showing the molecular stacking along the b axis in (I)

for both unique molecules. Molecules within each stack form offset face-to-face attractive contacts (Hunter et al., 1990

). Bottom: view down the b axis onto the ac plane. The crystal packing arrangement is stabilized by a series of C—H⋯π contacts between adjacent stacks, with H⋯ring-centroid (Cg) distances in the range 2.9 (5)–3.3 (5) Å. Dashed lines represent three of these contacts. (1) C4A—H26A⋯Cg of the ring C1–C6 in the molecule at (x, 1 + y, z) [H26A⋯Cg 2.9 (5) Å], (2) C2A—H24A⋯Cg of the ring C5A–C10A in the molecule at (1 − x, $[{1\over 2}]$ + y, 1 − z) [H24A⋯Cg 3.2 (6) Å] and (3) the symmetry equivalent of (1), where H26A and Cg are in the molecules at (1 − x, $[{1\over 2}]$ + y, 1 − z).

CRYSTALLOGRAPHIC
COMMUNICATIONS

ISSN: 2056-9890

Volume 61| Part 5| May 2005| Pages o1483-o1485

https://doi.org/10.1107/S1600536805012171

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