Abstract
The vibrational IR and Raman spectra of tetrachlorophthalic anhydride, tetrachlorophthalimide, N- d-tetrachlorophthalimide and potassium tetrachlorophthalimide have been measured for polycrystalline samples and the observed bands have been assigned tentatively by comparison with those of tetrahydro-compounds. To confirm the assignments, a normal coordinate analysis has been carried out on an assumption of the valence force field. The CO stretching modes of the OCXCO resonating system have been discussed in terms of the observed frequencies and the calculated force constants.
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