Raman Spectrum of Liquid Ethylene and Methane

Abstract

A search was made for the missing frequencies in the Raman spectrum of liquid methane. ν2(e) was found and the harmonic of ν4(f2). Intense plates were obtained of the Raman spectrum of liquid ethylene. The polarizations of the lines in this spectrum were obtained. ω6, the only missing Raman active fundamental, was found in the position predicted by Arnett and Crawford.