1,3-Difluoro-benzene

Abstract

The weak electrostatic and dispersive forces between C(+)- F(-) and H(+)- C(-) 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, C6H 4F2, 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.