Infrared Spectrum of Methyl Isocyanide

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Abstract
The infrared spectrum of methyl isocyanide vapor has been remeasured with medium resolving power from 1.7–10μ and in the far infrared region around 38μ. From these observations it has been possible to obtain unequivocally the three degenerate fundamental vibration frequencies v6, v7, and v8, and the symmetric frequency v3. Thermodynamic properties are calculated for the molecule. In addition the spectrum of acetonitrile vapor has been remeasured abound 6μ with slightly increased resolving power and the v3 and v6 fundamental frequencies obtained.