Absorption spectra of new oxomolybdenum(V) complexes of tetraphenylporphyrin with univalent ligands.
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概要
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New tetraphenylporphyrin complexes, MoO(tpp)X (X=F, Br, BF<SUB>4</SUB>, NCO, N<SUB>3</SUB>, and NCS), are easily prepared from the complex, MoO(tpp)OC<SUB>2</SUB>H<SUB>5</SUB>, where TPP denotes <I>meso</I>-tetraphenylporphyrin. The complexes are confirmed to contain a central oxomolybdenum(V) group based on the IR and the ESR measurements. The visible absorption spectra of the complexes in dichloromethane have three main peaks, the Soret band, the α and the β bands. The degree of red shifts of the corresponding absorption maxima is found to increase in the order: X=OC<SUB>2</SUB>H<SUB>5</SUB><BF<SUB>4</SUB>\simeqF<NCO<N<SUB>3</SUB><NCS<Cl<Br, accompanied with the same order of the change in the ratio ε<SUB>α</SUB>/ε<SUB>β</SUB>. The correlation is also observed between the red shifts of the absorption peak around 330 nm and those of the Soret band. The complexes, MoO(tpp)X, are classified to d-type hyperporphyrin.
- 公益社団法人 日本化学会の論文
著者
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Imamura Taira
Department Of Chemistry Faculty Of Science Hokkaido University
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FUJIMOTO Masatoshi
Department of Chemistry, Faculty of Science, Hokkaido University
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Numatatsu Takayuki
Department of Chemistry, Faculty of Science, Hokkaido University
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Terui Masashi
Department of Chemistry, Faculty of Science, Hokkaido University
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