A. Choudhury, Usha K. Urs, P. S. Smith
Nov 6, 2002
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Journal
Journal of Molecular Structure
Abstract
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·· ·p 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 ¼ 3.4213(9) A ˚ , /C‐ Cl· · ·Cl 0 ¼ 127.20(8)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 (4pyridyl) methanol. q 2002 Elsevier Science B.V. All rights reserved.