Add time:07/13/2019         Source:sciencedirect.com

As a part of our investigations on weak interactions involving organic fluorine, we have analyzed two representative compounds, (4-chlorophenyl)-(4-fluorophenyl)-(4-pyridyl) methanol and bis-(4-fluorophenyl)-(4-pyridyl) methanol. In these structures the molecules are linked by strong O–H⋯N hydrogen bonds to form antiparallel chains along the b axis. In addition, C–F⋯π interactions are observed as a consequence of the fluorine atom being flanked by two phenyl rings of the neighboring molecules. The first structure also has a significantly short intermolecular Cl⋯Cl interaction [type I, Cl⋯Cl=3.4213(9) Å, ∠C–Cl⋯Cl′=127.20(8)°] while the second structure though analogous to the first, does not display F⋯F interaction. The packing modes are rationalized in terms of intermolecular interactions in comparison with the reported structure of diphenyl (4-pyridyl) methanol.

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