Single-crystal Raman studies and the vibrational spectrum of the dithionate ion
- 1 January 1969
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A
- p. 1001-1008
- https://doi.org/10.1039/j19690001001
Abstract
A factor-group analysis of Na2S2O6,2H2O is described in detail. Unambiguous assignment of the Raman-active factor-group fundamentals follows from the single-crystal Raman observations. The relative magnitudes of the components of the derived polarizability tensor for all six Raman-active modes of the dithionate ion are calculated on the basis of the oriented gas-phase approximation. From these values the depolarization ratios for the Raman-active fundamentals of the S2O6 2– ion in aqueous solution are calculated, together with relative intensities of the Raman-active fundamentals in the solution spectrum and in the powder spectrum. On the basis of the ℒ-matrix derived from the vibrational analysis, together with the use of the δ-function model, derivative mean polarizability values are calculated. The powder i.r. and Raman spectrum of Na2S2O6,2H2O is reported together with the aqueous solution Raman spectrum of this compound. The agreement between observation and calculation is excellent, although the data derived from the δ-function model are open to criticism.Keywords
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