A modification of our previously reported2 gas chromatographic method of preparing vinyl‐14C2 chloride (14C‐VC) has been made. The procedure using 1,2‐dichloroethane‐14C2 obtained from New England Nuclear Corporation gave good yields of 14C‐VC as a gas mixture with helium. The radiochemical purity of a representative sample of the 14C‐VC was determined by gas chromatography. Sequential fractions were trapped from gas chromatographic columns in a toluene based liquid scintillator. The radioactivity‐time profile was correlated with the retention time of authentic VC gas. A mass spectrum and a high resolution infrared spectrum obtained on the same sample of 14C‐VC were identical to spectra of authentic VC. The major radioactive impurity appeared to be acetylene.
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Wagner et al. (1975) studied this question.
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