Abstract:
Abstract—The reaction between sulfur(IV) oxide and an aqueous suspension of aminoguanidinium hydro
carbonate yields (CN4H7)2SO3 ⋅ H2O, an “onium” sulfite, which has been characterized by Xray diffraction
and IR spectroscopy and mass spectrometry. The structure of the salt is stabilized by numerous Hbonds, such
as NH⋅⋅⋅O, OH⋅⋅⋅O, and NH⋅⋅⋅N. The incorporation of pyramidal ions into the network of Hbonds is
accompanied by the lowering of their symmetry in comparison with C3v, thus complicating the IR spectra of
the salt in the region where the vibrations of the anion appear.
