Results The ozonolyses of C2H3F were conducted at low temperature either in methyl chloride or in isobutane or neat, using standard techniquesQ as described in the Experimental Section. A workup procedure involving distillation of the crude reaction mixture through traps held at-63,-95, and-196" C and subsequent VPC and spectroscopic analysis of each trap was devised. The coldest trap was found to contain HCOF, C2H3F, and ( ...