Pyridine hydrochloride (12 g) heated to 190 -200 o C in a round bottom flask by using aluminium reaction block fitted on a magnetic stirrer. Slowly started melting from solid to solution state and rest of it attached to the neck of the RBF melted by using heat gun. The compound 2.PF6 (1g, 1.47 mmol) was added to the vigorously stirring reaction mixture when pyridine hydrochloride completely dissolved. Then allowed the reaction to stir at 190 -200 °C for next 1 -2 hours and then the heating was removed. Cool the reaction mixture to room temperature and suspended it in a minimum volume of water. The suspension was poured into 0.2 M KPF6 (aq.) (five-fold the volume of the suspension) solution under vigorous stirring. After stirring for 10 minutes, the suspension was allowed to settle down to form precipitates, and then filtered off. The red solid precipitates were again suspended in acetonitrile and subjected to heat at refluxing temperature for 1 hour, filtered off the hot mixture, and the solvent was removed under vacuum evaporation. The desired compound 3.PF6 was obtained as reddish-orange solid. Yield = 0.58 g (1.2 mmol, 81%).