YAKUGAKU ZASSHI
Online ISSN : 1347-5231
Print ISSN : 0031-6903
ISSN-L : 0031-6903
環状ジケトンの赤外部吸収スペクトル (第2報)
1,3-Cyclohexanedione誘導体のEnol-formについて
小寺 啓司
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1960 年 80 巻 9 号 p. 1270-1272

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The enol compound of 1, 3-cyclohexanediones in dilute chloroform solution forms a dimer merely by intermolecular hydrogen bonding and with increasingly higher concentration toward the solid, a conjugated chelate system is formed. In such a case, two absorption bands were observed in the C=O stretching region and these were assigned to the coupling vibration by averaging the force constants of C=O and C=C bonds. The intensity of this in-phase vibration was found to be proportional to the Hammet's constant of 4-substituent.

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