The Infrared Absorption Spectra of the n-2 Trans,4 Trans Dienaldehydes,C 5 through C 12

Abstract

The infrared absorption spectra of the normal 2, 4-dienaldehydes, from pentadienal through dodecadienal, were measured in the liquid state over the spectral range from 400 to 4000 cm⁻¹. The compounds were prepared by conventional methods and purified by gas-liquid chromatographic procedures immediately before spectrophotometry. Two strong bands near 1685 and 1643 cm⁻¹, four strong bands in the 980-1180 cm⁻¹ region, and a doublet in the aldehyde C-H stretching region are characteristic of the n-2 tram, 4 tram dienal structure.