ELECTRON-ATTACHMENT PRODUCTS OF METHYLENE-CHLORIDE IN SOLID ARGON - AN EXPERIMENTAL AND QUANTUM-CHEMICAL IR SPECTROSCOPIC STUDY

The nature and structure of electron attachment products in the photoi nduced electron transfer reaction DMA + CH2Cl2 [GRAPHICS] DMA(.+)+(ele ctron attachment products) in solid argon has been studied by FTIR spe ctroscopy (DMA = N,N-dimethylaniline, h nu = 4.88 eV Hg lamp radiation ) along with extensive ab initio calculations. Two attachment products have been identified: the radical anion of CH2Cl2 and the dichloromet hane anion (HCCl2-). The radical anion turns out to have a C-1 hydroge n bridged structure (ClHCH.... Cl-). This structure as well as the spe cies HCCl2- have not been detected before.