The atmospheric photochemical stability of CC1F2NO, CC12FNO, CC1FNO2, and CC12FNO2

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Title: The atmospheric photochemical stability of CC1F2NO, CC12FNO, CC1FNO2, and CC12FNO2
Author: Fazekas, George
Abstract: CC1F2N0, CC1F2N0, CC1F2N02 and CC12FN02 were prepared and purified in the laboratory. Three methods for the preparation of chlorodifluoronitrosomethane were evaluated: 1) decarboxylation of the sodium salt of chlorodifluoroacetic acid in the presence of nitrosyl chloride, 2) nitrosation of chlorodifluoromethanesulfenylchoride and 3) photolysis of bromodichlorofluoromethane in the presence of nitric oxide. The vapor phase decarboxylation of the sodium salt of chlorodifluoroacetic acid in the presence of nitrosyl chloride gave chlorodifluoronitrosomethane with the highest yield and purity. Because the sodium salt of dichlofluoroacetic acid was not available to utilize in a similar manner, dichlorofluoronitrosomethane was prepared from the reaction of dichlorofluoromethanesulfenylchloride with dilute nitric acid. Chlorodifluoronitromethane and dichlorofluoronitro- methane were prepared from the oxidation of their corresponding nitroso analogs with hydrogen peroxide and characterized by their infrared spectra. The boiling points and heats of vapor ization of CC12FN0, CC1F2N0, CC12FN02 and CC1F2N02 were determined by extrapolation of their respective temperature dependent vapor pressure curves. The UV-Vis absorption cross-sections of gaseous CC12FN0, CC1F2N0, CFC12N02 and CF2C1N02 were investigated in order to estimate their atmospheric photochemical stability. A literature search revealed that the absorption cross-sections of these compounds had not been investigated prior to this work.
Record URI: http://hdl.handle.net/1850/8768
Date: 1982-07

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