Intramolecular Hydrogen Bonding (Proton Transfer) of 1-Phenyl-1,3-butanedione

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概要

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• Through the 1H and 13C NMR measurements for the symmetrical β-diketones such as 2,4-pentanedione and 1,3-diphenyl-1,3-propanedione and unsymmetrical one such as 1-phenyl-1,3-butanedione at various concentrations and temperatures, we confirmed that 1-phenyl-1,3-butanedione in CDCl3 exists as monomers in its relatively low concentration. In addition, the 1-phenyl-1,3-butanedione in CDCl3 exists not as a keto-form but as two kinds of cis-enol forms. The proton transfer between the two kinds of cis-enols for 1-phenyl-1,3-butanedione was discussed thermodynamically; it is concluded that the OH proton of enol of 1-phenyl-1,3-butanedione is considerably located near the oxygen atom attached to the carbon atom linking to a phenyl group.

• 日本油化学会の論文

著者

• IWAHASHI Makio

  School of Science, Kitasato University

• MATSUZAWA Hideyo

  School of Science, Kitasato University

• Iwahashi Makio

  School Of Science Kitasato University

• Matsuzawa Hideyo

  School Of Science Kitasato University

• Nakagaki Takashi

  School of Science, Kitasato University

• Matsuzawa Hideyo

  北里大学 理学部化学科

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