Substituent Effects on the Mass Spectra of ortho-Hydroxyaromatic Aldehyde para-Substituted Benzylidenehydrazones

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概要

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• The difference between the mass spectra of Ar-CH=N-N=CH-Ar derivatives and those of Ar (OH)-CH=N-N=CH-Ar (OH) derivatives was pointed out. Mass spectra of 24 kinds of ortho-hydroxyaromatic aldehyde para-substituted benzylidenehydrazones (Ar (OH)-CH=N-N=CH-Ar'-R) were determined. These compounds were shown to have several kinds of characteristic fragment ions ; [Ar (OH)-CH=N]^+ (gion), [N=CH-Ar'-R]^+ (g'ion), [Ar (OH)-CH=N+H]^<+・>, [Ar (OH)-CH=N-H]^<+・>, [N=CH-Ar'-R+H]^<+・>, [N=CH-Ar'-R+2H]^+ and [M-OH]^+ (b ion). The relative ion intensities of g, g'and b ions were found to be strongly dependent on the substituent constant. And all of the values of log [g^+] / [^dM^<+・>], log [g'^+] / [^dM^<+・>], and log [b^+] / [^dM^+] were shown to correlate linearly with σ^+. The substituent effect on the value of either log [g'^+] / [g^+] or log [b^+] / [g^+] was found to be the reflection of the substituent effect on the difference of ionization potentials of either g・ and g'・ radicals or g・ and b・ radicals, respectively.

• 社団法人日本薬学会の論文
• 1976-12-25

著者

• 上田 陽

  Faculty of Pharmaceutical Sciences, Kyushu University

• 小川 建志

  Faculty Of Pharmaceutical Sciences Kyushu University

• 小野 行雄

  福山大学薬学部

• 上田 陽

  九州大学薬学部

• 小野 行雄

  Faculty of Pharmaceutical Sciences, Kyushu University

• 上田 陽

  Faculty Of Pharmaceutical Sciences Kyushu University

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