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Figure 8
Parameters introduced by Keehn (1983BB15) to describe the crystallographic data of [2.2]paracyclophanes. In (1)–(7) the bond lengths e and g are unrelated because of molecular dissymmetry and are therefore indicated separately in Table 2[link]. α denotes the interplanar angle between the 2,3,5,6 plane and the 2,1,6 plane, and β the angle between the 2,1,6 plane and the 1–7 bond vector. θ describes the angle of inclination of two least-squares phenylene ring planes. φ describes the angle that the 1,2,3,4 plane and the 4,5,6,1 plane make with one another, and ω defines the angle between the least-squares phenylene plane and the line drawn between the phenylene ring atoms of each ring bound to the same bridge.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 57| Part 6| November 2001| Pages 780-790
doi:10.1107/S0108768101013817
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