HCl in water HCl is added to the aniline slowly with vigorous stirring, an aq. soln.of the starting complex is added, stirred for 2 h at room temp.; the solid is filtd., washed (water and n-hexane), a second lot of fluoroaniline added to filtrate and mixt. stirred, ppt. obtained, washed, entire lot dried in vac., elem. anal.;