Efficient dehalogenation of polyhalomethanes and production of strong acids in aqueous environments: Water-catalyzed O-H-insertion and HI-elimination reactions of isodiiodomethane (CH 2I-I) with water

摘要

The ultraviolet photolysis of polyhalomethanes such as CH 2I 2 in water was investigated. The gas and solution pahse picosecond time-resolved resonance Raman spectroscopy was used for the study. It was observed that ultraviolet photolysis of CH 2I 2 led to almost complete conversion into CH 2(OH) 2 and 2HI products. It was also found that the photolysis at low concentration led to efficient dehalogenation as well as release of multiple strong acid (HI) leaving groups.