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. 2009 Oct 7;65(Pt 11):o2668-9.
doi: 10.1107/S1600536809038987.

1,3-Difluoro-benzene

Michael T Kirchner, Dieter Bläser, Roland Boese, Tejender S Thakur, Gautam R Desiraju

1,3-Difluoro-benzene

Michael T Kirchner et al. Acta Crystallogr Sect E Struct Rep Online. .

Abstract

The weak electrostatic and dispersive forces between C(δ+)-F(δ-) and H(δ+)-C(δ-) are at the borderline of the hydrogen-bond phenomenon and are poorly directional and further deformed in the presence of other dominant inter-actions, e.g. C-H⋯π. The title compound, C(6)H(4)F(2), Z' = 2, forms one-dimensional tapes along two homodromic C-H⋯F hydrogen bonds. The one-dimensional tapes are connected into corrugated two-dimensional sheets by further bi- or trifrucated C-H⋯F hydrogen bonds. Packing in the third dimension is controlled by C-H⋯π inter-actions.

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Figures

Fig. 1.
Fig. 1.
Crystal structure of 1,3-difluorobenzene: (a) two-dimensional network of C—H···F—C interactions viewed along the c axis, (b) with independent molecules coloured blue and green, (c) Herringbone arrangement of molecules viewed along the a axis and (d) coloured as before.
Fig. 2.
Fig. 2.
Displacement ellipsoid plot of 1,3-difluorobenzene.
See this image and copyright information in PMC

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