Weak hydrogen bonds in σ-1,4-difluorobenzene-ammonia: A rotational study

Structural and energetic features of the complex 1,4-difluorobenzene-ammonia have been investigate by rotational spectroscopy. The complex adopts a σ configuration, with the nitrogen of ammonia in the plane of the aromatic ring. Two weak hydrogen bonds, C–H⋯N and N–H⋯F, represent the linkages between ammonia and 1,4-difluorobenzene.