Introduction and background information.- The experiments.- Vacuum-ultraviolet negative photoion spectroscopy of SF6, CF4 and SF5CF3.- Vacuum-ultraviolet negative photoion spectroscopy of CF3Cl, CF3Br and CF3I.- Vacuum-ultraviolet negative photoion spectroscopy of SF5Cl.- Vacuum-ultraviolet negative photoion spectroscopy of small polyatomic molecules.- The reactions of CFn
+ (n = 1-3) with C2H4, C2H3F, CH2CF2 and C2HF3.- The reactions of C2F4
+ with C2H4, C2H3F, CH2CF2 and C2HF3.- Reactions of OH-, O-, CF3
-, F- and O2
- with C2H4, C2H3F, CH2CF2, C2HF3 and C2F4 .
