Decomposition and isomerization mechanisms of head-to-head α-pyridonato-bridged ethylenediamineplatinum(II) binuclear complex, [Pt2(en)2(C5H4NO)2]2+, in aqueous solution

Yuuki Ito, Kohei Yamashima, Shintaro Arai, Makoto Takahashi, Tomohiro Itou, Satoshi Iwatsuki, Koji Ishihara, Kazuko Matsumoto

研究成果: Article

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The isomerization reaction of the head-to-head α-pyridonato-bridged ethylenediamineplatinum(II) binuclear complex (HH-[Pt2(en)2(α-pyridonato)2]2+, HH dimer) to the head-to-tail isomer and the decomposition reactions of the HH and HT dimers to monomers in aqueous solution were studied in detail at various pH values using 1H NMR. It was found that the isomerization reaction proceeded preferentially at pH ~ 7. In contrast, the isomerization reaction and decomposition reactions preferentially proceeded at lower pH. An initial Pt–O (α-pyridonate) bond-breaking mechanism was proposed for both the isomerization and the acid-decomposition reactions based on the acid dependency of the detected reaction intermediate. The protonation of the dissociated oxygen atom of the monodentated α-pyridonate in the intermediate plays a vital role in determining isomerization or decomposition.

元の言語English
記事番号119934
ジャーナルInorganica Chimica Acta
513
DOI
出版物ステータスPublished - 2020 12 1

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

フィンガープリント Decomposition and isomerization mechanisms of head-to-head α-pyridonato-bridged ethylenediamineplatinum(II) binuclear complex, [Pt<sub>2</sub>(en)<sub>2</sub>(C<sub>5</sub>H<sub>4</sub>NO)<sub>2</sub>]<sup>2+</sup>, in aqueous solution' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

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