Chlorosulfonyl isocyanate images from Durig et al.

Fig 2. Raman spectra of chlorosulfonyl isocyanate: (A) solid; (B) liquid; and (C) calculated.
Fig 3. Mid-infrared spectra of chlorosulfonyl isocyanate: (A) gas; (B) xenon solution (-60 C); and (C) calculated.
Fig 4. Far infrared spectrum of gaseous chlorosulfonyl isocyanate. Bands marked with an asterick are due to the rotational transitions of HCl. Bands marked with a cross with accompanying fine structure to high frequency are due to HNCO. The bottom spectrum was taken with increased sample pressure.