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Raman spectroscopic studies of S 16 O 2 and S 18 O 2 in the gas phase: Hot band assignment
Author(s) -
Brooker M. H.,
Eysel H. H.
Publication year - 1981
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.1250110506
Subject(s) - raman spectroscopy , molecule , analytical chemistry (journal) , prolate spheroid , chemistry , spectral line , gas phase , crystallography , phase (matter) , nuclear magnetic resonance , atomic physics , physics , optics , organic chemistry , chromatography , classical mechanics , astronomy
Raman spectra have been obtained for the fundamental modes of S 16 O 2 and S 18 O 2 in the gaseous phase: S 16 O 2 , ν 1 =1151.3, ν 2 =518.2, ν 3 =1361.5; 18 O 2 , ν 1 =1100.8, ν 3 =1318.0 cm −1 . Band shapes for the isotopically different molecules are essentially identical and conform to expectations for a nearly prolate symmetric top molecule. Accurate isotopic shifts for a number of naturally abundant isotopically different molecules are reported. A weak peak shifted −3.1 cm −1 from the ν 1 peaks of S 16 O 2 and S 18 O 2 has been assigned to the hot band transition 010→110. This assignment has been confirmed by temperature variation studies of S 16 O 2 in CCl 4 liquid.