H. Ramsis et al., ANALYSIS OF THE VIBRATION-SPECTRA OF 3,3' -THIODIPROPIONIC ACID AND ITS ALKALINE-SALTS, Journal of Raman spectroscopy, 29(4), 1998, pp. 331-341
The Raman and infrared spectra of 3,3'-thiodipropionic acid and its po
tassium salts in aqueous solution were recorded from 4000 to 200 cm(-1
). An assignment of the fundamental vibrations is proposed. Analysis o
f the polarization of the Raman lines indicated that the acid, the aci
d salt and the neutral salt belong to the C-s symmetry group, On the b
asis of the intermolecular hydrogen bond present iu the crystalline st
ate of the acid salts, the potassium and sodium 3,3'-thiodipropionate
acids can be classified as type A and B structures, respectively, acco
rding to Speakman.