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Haruhiko Yamamoto

University of Tokyo

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Bioinorganic Chemistry | 1976

Magnetic circular dichroism on the reversible oxygenation of dimethylmesoporphyrin-IX-atopyridinecobalt (II).

Tsunenori Nozawa; Masahiro Hatano; Haruhiko Yamamoto; Takao Kwan

The magnetic circular dichroism spectra were measured for the dimethylmesoporphyrin-IX-atocobalt complexes. As expected dimethylmesoporphyrin-IX-atocobalt (III) and its pyridine complex exhibited the MCD for a typical D4h metalloporphyrins. Dimethylmesoporphyrin-IX-atocobalt (II) and its pyridine complex showed a paramagnetic effect on the MCD especially in the Soret region. A very atypical Soret MCD for the oxygenated dimethylmesoporphyrin-IX-atopyridinecobalt (II) was attributed to the existence of a CT band associated with oxygen from the similarity to the MCD for oxymyoglobin. Temperature-dependent MCD change for the cobalt (II) oxygen complex revealed the reversible oxygen binding to dimethylmesoporphyrin-IX-atopyridinecobalt (II) with KO2 of 3.2 X 10(-3) in (mmHg)-1 at 228 degrees K.

Bulletin of the Chemical Society of Japan | 1963

The Catalytic Activity of Metal Oxides of the Fourth Period in the Hydrogen-Oxygen Reaction. A Commentary on a Paper by Popovskii and Boreskov

Isamu Komuro; Haruhiko Yamamoto; Takao Kwan

Bulletin of the Chemical Society of Japan | 1975

The Ligation of Phosphine Derivatives and the Oxygen-binding Properties of the Cobalt Mesoporphyrin IX Dimethyl Ester in Toluene

Teruo Takayanagi; Haruhiko Yamamoto; Takao Kwan

Bulletin of the Chemical Society of Japan | 1975

The Role of Anion in the Demethylation Reaction of Methylcobalamin with Mercuric Salts

Haruhiko Yamamoto; Takashi Yokoyama; Ju-Ling Chen; Takao Kwan

Chemical & Pharmaceutical Bulletin | 1974

On the Reaction of the Sulfite Radical Anions with Thioureas

Toshihiko Ozawa; Morio Setaka; Haruhiko Yamamoto; Takao Kwan

Chemical & Pharmaceutical Bulletin | 1975

Methylation of Quinones by Methylcobalt Complexes in the Presence of Palladium Salt

Jong Yoon Kim; Haruhiko Yamamoto; Takao Kwan

Chemical & Pharmaceutical Bulletin | 1969

Catalytic Hydrogenation of Calcium D-Xylo-5-hexulosonate on Transition Metal Catalysts

Chauyang Chen; Haruhiko Yamamoto; Takao Kwan

Bulletin of the Chemical Society of Japan | 1977

An ESR Study of Photo-Induced Electron Transfer Reaction between Zinc(II)–Tetraphenylporphyrin and p-Benzoquinone in Solutions

Masayuki Shiozawa; Haruhiko Yamamoto; Yuzaburo Fujita

Bulletin of the Chemical Society of Japan | 1969

Isomerization and Hydrogenation of Dimethyl Maleate and 1,5-Cyclooctadiene by Nickel Cyanide Complex

Hiroshi Samejima; Taiichi Mizuta; Haruhiko Yamamoto; Takao Kwan

Chemical & Pharmaceutical Bulletin | 1973

Carboxylation of Cyclohexanone by Carbon Dioxide and Potassium Pyrrolidone in Aprotic Solvents

Hisakazu Mori; Yuji Makino; Haruhiko Yamamoto; Takao Kwan

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Takao Kwan

University of Tokyo

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Chauyang Chen

University of Tokyo

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Makoto O'hara

University of Tokyo

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Takashi Yokoyama

Okayama University of Science

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Teruo Takayanagi

University of Pennsylvania

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Hiroshi Samejima

University of Tokyo

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Hiroshi Tokumaru

University of Tokyo

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Hiroyuki Horiguti

University of Tokyo

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Hisakazu Mori

University of Tokyo

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Jong Yoon Kim

University of Tokyo

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