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Figure 1
A polar plot showing the torsion-angle values obtained from a search of the CSD for the fragment CH2–CH2–CH2–C(=O). All C atoms were defined as acyclic. The distribution shows three clear modes (i.e. a trimodal distribution) centred on ca 60, 180, −60°, with the largest number of structures within the distribution adopting a trans conformation at this torsion angle, i.e. in the mode centred around 180°. |