mol is charged the reactor is subsequently cooled to u2212 70 u00b0 c for u00bd hour and 6 35 g of clf 0 116 mol is added slowly at a rate of 2 g 15 min after addition of clf the reaction mixture is stirred at u2212 55 u00b0 c for about 2 hours then the temperature is raised to 20 u00b0 c over a period of 1 hour under vigorous stirring the mixture is stirred at this temperature for another 2 hours the mixture is then cooled to u2212 50 u00b0 c and 10 g of water are added to the reactor and stirring continues for 15 additional minutes the reactor temperature was then brought back to 20 u00b0 c the gaseous products from the reactor are then transferred to a collection cylinder which is maintained at liquid nitrogen temperature gc and ms analysis and material balance of the sample from the collection cylinder show that almost 100 of the starting cf 3 ch u2550 ch 2 is converted to cf 3 cfclch 2 f with almost 99 selectivity this example illustrates the reaction of hf and cl 2 with cf 3 ch u2550 ch 2 in a liquid phase reaction it.