環状ジケトソの赤外部吸収スペクトル (第6報)

1,2-Cyclohexanedioneと2-Anilino-2-cyclohexen-1-oneの検討

抄録

Infrared absorption spectra of 1, 2-cyclohexanedione, the representative cyclic α-diketone, and its deuterated compound were examined and it was found from the positions of OH and OD bands that there is no strong interaction here corresponding to the conjugated chelation in β-diketones. From the comparison with the result of measurement on diosphenol by Févre, et al., and from the result of dilution with chloroform, the C=O stretching vibration at 1735cm^-1 in the spectrum of 1, 2-cyclohexanedione was assumed to be due to the presence of a diketo form.
From the behavior of absorption bands in the region of 1500-1680cm^-1 in 2-anilino-2-cyclohexen-1-one, there was no marked resonance effect such as seen in α, β-unsaturated β-aminoketones.