Abstract:
Aqueous reaction of ammonium thiosulfate with ethylenediamine (en) results in the formation of the title compound (enH2)[S2O3] (1) (enH2 = ethylenediammonium) in good yields. Compound 1 was characterized by analytical data, IR, Raman and NMR spectra, X-ray powder pattern and its crystal structure was determined. The structure of 1 which crystallizes in the non-centrosymmetric orthorhombic space group P2sub(1)2sub(1)2sub(1), consists of two crystallographically independent (enH2)2+ dications and two unique thiosulfate anions, which are interlinked by three varieties of H-bonding interactions, namely N-H...O N-H...S, and C-H...O. 1H and 13C NMR spectra reveal the purity of 1 while its transparent nature can be evidenced from the UV-Vis-NIR spectral data. In compound 1 which exhibits SHG property, the infrared and Raman spectra confirm the presence of the organic dication and the thiosulfate anion.
