Abstract A series of chlorofluoroalkanes having chlorines on adjacent carbon atoms has been prepared, ie nC 5 F 11 CFClCCl 3, nC 6 F 13 CFClCCl 3, nC 5 F 11 CFClCFCl 2, nC 6 F 13 CFClCFCl 2, nC 5 F 11 CFClCF 2 Cl, nC 2 F 5 CFClCFClC 3 F 7 and n-CF 3 CFClCFClC 4 F 9, by a combination of halogen exchange, dehalogenation and chlorine addition reactions. An attempt to synthesize nC 6 F 13 CFClCF 2 CFCl 2 by the coupling of ...