Reaction of an α-pyrrolidonate-bridged cis-diammineplatinum(II) dimer with molecular oxygen and its application to the catalytic O2 oxidation of hydroquinone

Ken Sakai; Taro Tsubomura; Kazuko Matsumoto

doi:10.1016/0020-1693(95)04465-L

Reaction of an α-pyrrolidonate-bridged cis-diammineplatinum(II) dimer with molecular oxygen and its application to the catalytic O₂ oxidation of hydroquinone

Ken Sakai, Taro Tsubomura, Kazuko Matsumoto

研究成果: ジャーナルへの寄稿 › 学術誌 › 査読

16 被引用数 (Scopus)

抄録

The catalytic effect of [Pt^II₂(NH₃)₄(C₄H₆NO)₂]²⁺ (Pt^II₂ dimer; C₄H₆NO = α-pyrrolidonate) in the O₂ oxidation of hydroquinone to quinone is investigated at pH 5. Both the O₂ oxidation of this dimer into [Pt^III₂(NH₃)₄(C₄H₆NO)₂(L)₂]⁴⁺ (Pt^III₂ dimer; L = OH₂, OH^-, SO₄^2-, etc.) and the re-reduction of the Pt^III₂ dimer into the Pt^II₂ dimer by hydroquinone were found to be thermodynamically favorable. With an excess of hydroquinone, the rate of the catalytic reaction exceeds that of the former reaction and is roughly linear to the hydroquinone concentration, suggesting that a certain intermediate formed in the reaction between the Pt^II₂ dimer and O₂ plays a major role in the present catalysis. In addition, hydrolysis equilibria for the axial aqua ligands on the Pt^III₂ dimer are investigated spectrophotometrically.

本文言語	英語
ページ（範囲）	157-161
ページ数	5
ジャーナル	Inorganica Chimica Acta
巻	234
号	1-2
DOI	https://doi.org/10.1016/0020-1693(95)04465-L
出版ステータス	出版済み - 1月 1 1995
外部発表	はい

!!!All Science Journal Classification (ASJC) codes

物理化学および理論化学
無機化学
材料化学

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10.1016/0020-1693(95)04465-L

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title = "Reaction of an α-pyrrolidonate-bridged cis-diammineplatinum(II) dimer with molecular oxygen and its application to the catalytic O2 oxidation of hydroquinone",

abstract = "The catalytic effect of [PtII2(NH3)4(C4H6NO)2]2+ (PtII2 dimer; C4H6NO = α-pyrrolidonate) in the O2 oxidation of hydroquinone to quinone is investigated at pH 5. Both the O2 oxidation of this dimer into [PtIII2(NH3)4(C4H6NO)2(L)2]4+ (PtIII2 dimer; L = OH2, OH-, SO42-, etc.) and the re-reduction of the PtIII2 dimer into the PtII2 dimer by hydroquinone were found to be thermodynamically favorable. With an excess of hydroquinone, the rate of the catalytic reaction exceeds that of the former reaction and is roughly linear to the hydroquinone concentration, suggesting that a certain intermediate formed in the reaction between the PtII2 dimer and O2 plays a major role in the present catalysis. In addition, hydrolysis equilibria for the axial aqua ligands on the PtIII2 dimer are investigated spectrophotometrically.",

author = "Ken Sakai and Taro Tsubomura and Kazuko Matsumoto",

year = "1995",

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T1 - Reaction of an α-pyrrolidonate-bridged cis-diammineplatinum(II) dimer with molecular oxygen and its application to the catalytic O2 oxidation of hydroquinone

AU - Sakai, Ken

AU - Tsubomura, Taro

AU - Matsumoto, Kazuko

PY - 1995/1/1

Y1 - 1995/1/1

N2 - The catalytic effect of [PtII2(NH3)4(C4H6NO)2]2+ (PtII2 dimer; C4H6NO = α-pyrrolidonate) in the O2 oxidation of hydroquinone to quinone is investigated at pH 5. Both the O2 oxidation of this dimer into [PtIII2(NH3)4(C4H6NO)2(L)2]4+ (PtIII2 dimer; L = OH2, OH-, SO42-, etc.) and the re-reduction of the PtIII2 dimer into the PtII2 dimer by hydroquinone were found to be thermodynamically favorable. With an excess of hydroquinone, the rate of the catalytic reaction exceeds that of the former reaction and is roughly linear to the hydroquinone concentration, suggesting that a certain intermediate formed in the reaction between the PtII2 dimer and O2 plays a major role in the present catalysis. In addition, hydrolysis equilibria for the axial aqua ligands on the PtIII2 dimer are investigated spectrophotometrically.

AB - The catalytic effect of [PtII2(NH3)4(C4H6NO)2]2+ (PtII2 dimer; C4H6NO = α-pyrrolidonate) in the O2 oxidation of hydroquinone to quinone is investigated at pH 5. Both the O2 oxidation of this dimer into [PtIII2(NH3)4(C4H6NO)2(L)2]4+ (PtIII2 dimer; L = OH2, OH-, SO42-, etc.) and the re-reduction of the PtIII2 dimer into the PtII2 dimer by hydroquinone were found to be thermodynamically favorable. With an excess of hydroquinone, the rate of the catalytic reaction exceeds that of the former reaction and is roughly linear to the hydroquinone concentration, suggesting that a certain intermediate formed in the reaction between the PtII2 dimer and O2 plays a major role in the present catalysis. In addition, hydrolysis equilibria for the axial aqua ligands on the PtIII2 dimer are investigated spectrophotometrically.

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JO - Inorganica Chimica Acta

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