By X-ray crystallography the structures of three compounds of the 2,2¢-bipyridine type - 2-(5-phenylpyridin-2-yl)quinolines, including those having a cyclopentylene moiety condensed to the pyridine ring and/or two fluorine atoms at quinoline positions 6 and 7. The effect of fluorine atoms on the geometry of the aromatic system and intermolecular interactions is shown.