R. Steudel et al., X-RAY STRUCTURAL-ANALYSIS AND VIBRATIONAL-SPECTRA OF SODIUM CYSTEINE-S-SULFONATE, -)CH2S2O3NA.3(H3NCH(COO)2H2O/, Zeitschrift fur Naturforschung. B, A journal of chemical sciences, 48(5), 1993, pp. 555-560
The title compound crystallizes orthorhombically (space group C222(1))
with a = 797.0, b = 870.3 and c = 2739.0 pm. The anions are zwitterio
ns which are heavily involved in intra- and intermolecular NH ... O an
d OH ... O hydrogen bonding. The two types of sodium cations are coord
inated by six oxygen atoms each of which belongs to either SO3 groups
(Na 2) or water molecules and SO3 groups (Na1). A second type of water
molecules is not coordinated to the cations. The SS bond length is 20
8.2 pm. Infrared and Raman spectra of the title compound are reported
and tentatively assigned. The SS stretching vibration is observed at 4
09 cm-1.