Low frequency Raman-active lattice vibrations of n -paraffins
- 1 July 1973
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 59 (1) , 534-544
- https://doi.org/10.1063/1.1679839
Abstract
Raman spectra in the frequency range 5–200 cm−1 have been measured for a series of crystalline n ‐paraffins from n ‐C5H12 to n ‐C26H54 and also n ‐C32H66, n ‐C35H72, and n ‐C36H74. It is found that the spectral data may be grouped consonant with crystal structures exhibited by n ‐paraffins. The data are used to map out portions of the transverse acoustical phonon dispersion curves of the orthorhombic polyethylenelike lattice and of one triclinic crystalline form. A band whose frequency is independent of chain length is observed for the orthorhombic n ‐paraffins and is assigned to the B 3g rotatory lattice mode of polyethylene.Keywords
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