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Liaison hydrogène en phase liquide et spectrométrie Raman. IV—structure des polymères du méthanol liquide pur et dissous en solvants inertes
Author(s) -
Maillard D.,
Perchard C.,
Perchard J. P.
Publication year - 1978
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250070403
Subject(s) - raman spectroscopy , methanol , polymerization , degree of polymerization , polymer chemistry , chemistry , polymer , materials science , organic chemistry , physics , optics
Calculations of νOH vibrational frequencies and of the corresponding IR and Raman intensities have been carried out according to two models of polymerization of alcohols (chains and cycles). They are compared to experimental spectra of methanol (pure liquid and solutions in CCl 4 ) and of isopropanol dissolved in freons at low temperature. For methanol at 295 K, the best fit is obtained for a cyclic structure of polymers, with an average degree of polymerization of 5–6; for isopropanol at 106 K cyclic tetramers are preponderant.