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Raman spectra and vibrational dephasing of methylacetylene
Author(s) -
Kalasinsky V. F.,
Little T. S.
Publication year - 1983
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.1250140408
Subject(s) - dephasing , raman spectroscopy , isotropy , raman scattering , chemistry , spectral line , hydrogen bond , gas phase , molecular physics , analytical chemistry (journal) , molecule , optics , condensed matter physics , organic chemistry , physics , astronomy
The Raman spectra of gaseous and liquid methylacetylene have been recorded. The spectrum of the gas provides new data for verifying the vibrational assignments of certain A 1 and E fundamentals. Some of the vibrations exhibit hot bands whose origins have been determined on the basis of their Raman intensities. The isotropic scattering for the three fundamentals in the liquid state was studied as a function of temperature. The hot band structure in the liquid state was modeled by using curve‐fitting procedures and the assignments made for the gas phase. The isotropic bandwidths for the fundamentals were observed to increase with decreasing temperature, and the broadening is consistent with the existence of a weak hydrogen bond in pure methylacetylene.