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Interaction between CO Stretching and Overtone of CD Out-of-plane Bending Observed in the Infrared Spectra of Deuteroformyl Compounds

Volume 33, Number 6 (Dec. 1979) Page 639-640

Rowe, J.E.; Spinner, E.

Dahlqvist and Euranto reported an apparent doubling of the infrared carbonyl stretching band of a number of alkyl deuteroformate esters. By comparison with the corresponding protioformate esters and a process of elimination, they showed that the apparent CO band at higher frequencies must be the overtone of CD out-of-plane bending ("2 × CD op be") in Fermi resonance with CO stretching ("CO st").