Far-infrared spectra of ethane, ethylene and acethylene

Publication

Reference: Schwartz Y. A., Ron A., Kimel S. (1971). Far-infrared spectra of ethane, ethylene and acethylene. J. Chem. Phys., 54, 99 - 105.

Names

Title: Far-infrared spectra of ethane, ethylene and acethylene
Abstract: The far-infrared spectra of crystalline C$_2$H$_6$, C$_2$D$_6$, C$_2$H$_4$, C$_2$D$_4$, C$_2$H$_2$, and C$_2$D$_2$ have been recorded at various temperatures between 25 and 140K. Each compound showed two absorption bands which were shown to be due to translational lattice modes. Upon heating, these bands broadened and decreased in intensity; they were also displaced toward lower frequencies by about 0.1 cm$^-1$/K. For ethylene an analysis was carried out based on the 'diatomic potential'. Here each molecule was assumed to consist of a pair of centers separated by an effective distance d, each center interacting, through a Lennard-Jones-type potential, with the centers in all neighboring molecules. Frequencies and thermal frequency shifts were calculated as a function of d, and good agreement was attained with the observed values for ethylene, with d = 1.04 $\rA$.
Keywords: spectroscopy, transmission spectra, absorbance spectra, band position, band width, band integrated intensity, band strength, far-IR, molecular solid, crystalline, isotope, ice, C2H2, C2D2, C2H4, C2D4, C2H6, C2D6
Content: spectral data, band list data, experimental physics

Doi

10.1063/1.1674648

Identifiers