Abstract

The IR and Raman spectra of liquid and crystalline mehtyl trichloroacetate (M-TCA) and its deutrate (M-TCA-d 3) have been recorded. The spectra are analysed on the basis of the spectral comparison with related compounds and also with aid a normal coordinate calculation on M-TCA and M-TCA-d 3. The vibrational and 35Cl NQR spectra indicate that the M-TCA molecule exists in the (itcis) form in relation to the chlorine atom and the carbonyl group. Anomalous temperature dependences of the 35Cl NQR and Raman frequencies observed in crytalline M-TCA are reported and discussed qualitatively.

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