The Vibrational Spectra of Cyanoacetic Acid and Sodium Cyanoacetate

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The complete vibrational spectra of cyanoacetic acid and sodium cyanoacetate have been recorded. A tentative vibrational assignment for both molecules is proposed. The results appear to be most consistent with a hydrogen-bonded polymer structure of cyanoacetic acid. The marked effect of temperature on the infrared spectrum of the acid has been explained in terms of an order-disorder transition involving the position of the hydrogen atoms forming the hydrogen bonds in the crystal.

Keywords: Cyanoacetic acid; Hydrogen bonding; Infrared spectra; Molecular structure; Raman spectra

Document Type: Research Article


Affiliations: Department of Chemistry, Miami University, Oxford, Ohio 45056

Publication date: November 1, 1972

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