The Ligation of Phosphine Derivatives and the Oxygen-binding Properties of the Cobalt Mesoporphyrin IX Dimethyl Ester in Toluene
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概要
- 論文の詳細を見る
The coordination of phosphine derivatives and some other bases to the cobalt mesoporphyrin IX dimethyl ester in toluene has been spectrophotometrically investigated. The coordination equilibrium constants were determined for each base, and found to be of this sequence (25 °C) : P(C<SUB>4</SUB>H<SUB>9</SUB>)<SUB>3</SUB>>>P(OCH<SUB>3</SUB>)<SUB>3</SUB>>P(C<SUB>6</SUB>H<SUB>5</SUB>)<SUB>3</SUB>>S(CH<SUB>3</SUB>)<SUB>2</SUB>>As(C<SUB>6</SUB>H<SUB>5</SUB>)<SUB>3</SUB>. The reversible oxygenation of the penta-coordinate complexes formed as above was investigated at lower temperatures (−20–−80 °C): the corresponding equilibrium constants were found to be in the following sequence (−80 °C): P(C<SUB>4</SUB>H<SUB>9</SUB>)<SUB>3</SUB>>P(OCH<SUB>3</SUB>)<SUB>3</SUB>>S(CH<SUB>3</SUB>)<SUB>2</SUB>>P(C<SUB>6</SUB>H<SUB>5</SUB>)<SUB>3</SUB>>As(C<SUB>6</SUB>H<SUB>5</SUB>)<SUB>3</SUB>. These relations were discussed in terms of the σ-donating ability of a ligand coordinated trans to oxygen.
- 公益社団法人 日本化学会の論文
著者
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Yamamoto Haruhiko
Faculty Of Agriculture Yamaguchi University
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Kwan Takao
Faculty Of Pharmaceutical Sciences Teikyo University
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Kwan Takao
Faculty of Pharmaceutical Sciences, University of Tokyo
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Takayanagi Teruo
Faculty of Pharmaceutical Sciences, The University of Tokyo
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Yamamoto Haruhiko
Faculty of Pharmaceutical Sciences, University of Tokyo
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Takayanagi Teruo
Faculty of Pharmaceutical Sciences, University of Tokyo
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