MATRIX PHOTO-IONIZATION OF DIHALOFLUOROMETHANES - INFRARED-SPECTRA OF PARENT AND DAUGHTER CATIONS AND INTRA-MOLECULAR HYDROGEN-BONDED PARENT ANIONS IN SOLID ARGON AT 15-K

Dilute samples of dihalofluoromethanes in argon were subjected to argon discharge radiation during condensation at 15 K. New infrared absorptions were grouped by filtered mercury-arc photolysis and assigned to CFX2 radicals, CFX2+ cations, (CHFX+)X daughter cations, parent cations, and two different types of intramolecular hydrogen-bonded parent anions. The two anions produced upon electron capture by CHFCl2 showed no carbon-13 shift for the hydrogen stretching mode, which suggests the F-H-(CCl2)- and Cl-H-(CFCl)- arrangements. The effect of halogen substitution is demonstrated by the observation of similar F-H-(CBr2)- and F-H-(CI2)- and different Br--HCFBr and I--HCFI intramolecular hydrogen-bonded anions. © 1979 American Chemical Society.