Structure cristalline de ClO 2 par spectroscopie de vibration infrarouge et raman

The infrared (4000-180 cm ^-1 and Raman (1200-40 cm ^-1) spectra of crystalline chlorine dioxide can be explained from similarities between ClO ₂ and SO ₂ (space group Aba ( C¹⁷_2v)) and four molecules (site C₂) per unit cell. The assignments made were: v₁ ( A₁ 912-917 cm ^-1, v₁( A₂) 939-944 cm ^-1, v₁ ( A₁) 465 cm ^-1, v₁ ( A₂) 456-459 cm ^-1, v₃ ( B₁ and B₂) 1052-1121 cm ^-1. The presence of four molecules per unit cell is corroborated by analysis of Raman lattice vibrations. Evidence for the isotopic ³⁵Cl- ³⁷Cl effect was found in a partial study of liquid ClO ₂. Dimerization is not possible in the solid state, and consequently it is forbidden in the other states.