Raman Spectra of Deuteroethylenes

THE various deuteroethylenes can be obtained by exchange from ethylenes and deuterium oxide on a nickel catalyst. 15 gm. of heavy water (D 2 O) and 6 litres of ethylenes ( N.T.P. ) yielded after an exchange of several days at 150° C. a mixture of ethylenes containing about 50 per cent of the hydrogen as deuterium. The Raman spectrum of this substance was taken. In order to identify the lines and attribute them unambiguously to the different compounds, some of the deuteroethylenes have been prepared in a pure state. The ethylene C 2 D 4 was obtained in the following way: