文摘
Crystallization of 2,2′-bipyridine from aqueous solution containing sulfur(IV) oxide afforded clathrates with the composition (bipy)k · (SO2)m · (H2O)n. X-Ray amorphous guest SO2 molecules occupy voids in the crystal lattice of 2,2′-bipyridine without distortion of its structure. The isolated compounds were characterized by elemental analyses, X-ray diffraction data, and IR, NMR, and mass spectra.