 | Acta Crystallographica Section B Acta Crystallographica Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS |
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![[Figure 1]](aw5015fig1mag.jpg)
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Figure 1
Geometrical parameters used to describe stacking interactions between two TTF fragments: P and P′ are the average planes of interacting fragments; d is the distance between the centers of two C=C double bonds (Ω and Ω′), while d1 is the shortest distance between the centroids of two interacting five-membered rings (Ω1 and Ω1′). Normal distance R is the distance between centroid Ω′ and its projection ΩP′ onto the P plane. Horizontal displacement r is the distance between the centroid Ω and the projection ΩP′. The torsion angle defining the orientation of TTF fragments is defined by centroids: Ω1–Ω–Ω′–Ω1′. |
![[Figure 1]](aw5015fig1.jpg)
| STRUCTURAL SCIENCE CRYSTAL ENGINEERING MATERIALS |
ISSN: 2052-5206
