Continuous variation method was also used to determine the stoichiometric ratio of the R1 to the fluoride and acetate anion guest (Job's plot for complexation of R1 with fluoride and acetate anions are shown in Fig. 6(a) & (b)). A Job's plot of the R1with fluoride and acetate anion in DMSO shows the maxima at a molar fraction [39] of 0.5 in both the anions. This clearly indicates that the R1 bind with the fluoride and acetate anion in 1:1 ratio.