Abstract
The IR and Raman spectra of Cs(SO 2), K(SO 2) and Na(SO 2) molecules were studied by 32S/ 34S and 16O/ 18O isotopic substitution technique. These molecules have a planar ring configuration of C 2 v symmetry with the OSO angle equal to 109°±5° and the SO bond length of 0.149±0.001 nm. The alkali metal atom interacts symmetrically with the oxygen atoms of the SO 2 − group. The doubling observed for the vibrations of Cs(S 16O 18O) was attributed to a matrix effect.
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