Theoretical investigation of in-plane hydrogen-bonded complexes of ammonia with partially substituted fluorobenzenes

The systematic investigation of in-plane hydrogen-bonded complexes of ammonia with partially substituted fluorobenzenes has shown that fluorobenzene, difluorobenzene and trifluorobenzene have favored the formation of cyclic complexes with a C-H...N-H...F-C binding motif. The tendency with which fluorobenzenes adapt to the C-H...N-H...F-C binding motif has decreased with the progressive fluorination of the benzene ring and has disappeared completely when benzene ring is substituted with five or more fluorine atoms.