Add time:07/29/2019         Source:sciencedirect.com

The laser Raman and IR spectra of crystalline terephthalic acid, terephthalic acid-d4 and dipotassium terephthalate are investigated in the region 33—4000 cm−1. The acid bands have been assigned on the basis of the reported crystal and molecular structure, and the molecular symmetry of the terephthalate ion in the crystalline state is discussed. Vibrational assignments for the observed spectra are proposed, based on a modified oriented-gas model.

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