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Figure 8
Overlay of real molecule (black) and fitted model (blue) for bi­phenyl skeletons cut from two different molecules. The C24H30N4O4 molecule (top) (Holý et al., 2001BB12) has somewhat bulky substituents on all ortho positions, hence the rather large dihedral angle 2φ. The bi­phenyl skeleton (bottom) is part of a fluorene molecule (Burns & Iball, 1955BB6) with point group m. Though the latter molecule is not perfectly flat, its 2φ value is still exactly 0°. The considerable distortion is due to the skewed phenyl rings.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 56| Part 6| December 2023| Pages 1855-1864
https://doi.org/10.1107/S1600576723008476
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