環状ジケトンの赤外部吸収スペクトル (第4報)

Keto-amine誘導体の検討

抄録

Of the three absorption bands, ν₁, ν₂ and ν₃, present in the region of 1600-1500cm^-1 in α, β-unsaturated β-amino-ketones formed by substitution of enolic hydroxyl in 1, 3-cyclohexanediones with anilino, benzylamino, and phenethylamino group, ν₃ corresponds to the amide-II band in the secondary amide, and ν₁, and ν₂ were considered to be explanable in a same manner as the coupling vibration of C=O and C=C described in Part I of this series. The intensity of this in-phase vibration was found to be proportional to the aromaticity of the substituted amines.