@article{3012979,
    title = "Low-frequency Raman spectroscopy of n-alcohols. LAM vibration and crystal structure",
    author = "Soutzidou, M. and Glezakou, V.-A. and Viras, K. and Helliwell, M. and Masters, A.J. and Vincent, M.A.",
    journal = "JOURNAL OF PHYSICAL CHEMISTRY B: CONDENSED MATTER, MATERIALS, SURFACES, INTERFACES, AND BIOPHYSICAL (THE)",
    year = "2002",
    volume = "106",
    number = "17",
    pages = "4405-4411",
    issn = "1089-5647",
    doi = "10.1021/jp025586l",
    keywords = "Longitudinal acoustic modes (LAM), Crystal structure;  Dimers;  Hydrogen bonds;  Raman spectroscopy, Alcohols",
    abstract = "Low-frequency Raman spectra of even and odd n-alcohols have been recorded. The longitudinal acoustic modes (LAM) are described, and the effects of hydrogen-bonding, chain length, and temperature on the frequencies of these vibrations are discussed. The frequencies of the LAMs are interpreted in terms of the one-dimensional crystal model of Minoni and Zerbi and also ab initio calculations on isolated single chains. The low-frequency LAM-1 mode of the hydrogen-bonded dimer exhibited an odd-even effect, and to gain insight into this, the crystal structures of the C17 and C20 alcohols were determined by single-crystal X-ray diffractometry. C17H35OH packs in the β form, with half the oxygen atoms trans and half gauche, with respect to the alkyl chains. C20H41OH adopts an all trans conformation and the packing is in the γ form. The hydrogen-bonding interactions differ in the two structures. We therefore ascribe the odd-even effect in the LAM-1 frequencies to an odd-even effect in crystal structure."
}