Synthesis and Thermochromic Properties of New Five-coordinate Copper Chelates
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概要
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Two new five-coordinate copper(II) chelates [Cu(PCdien)] and [Cu(PCenpn)] were prepared, and the thermochromism of the former in methanolic solution was studied. When this violet-blue solution (ν<SUB>max</SUB>: 16500 cm<SUP>−1</SUP>) was heated nearly to the boiling point of methanol, the color of the solution became gradually yellowish (ν<SUB>max</SUB>: 21000 cm<SUP>−1</SUP>). The absorption spectra of these cold and hot solutions were compared with those of similar four-coordinate Cu(II) complexes in various solvents, and the yellow color was ascribed to a tetracoordinated species of [Cu(PCdien)], which is formed by the partial rupture of the pentacoordinated structure caused by the intramolecular steric strains. No thermochromic property of the PCenpn chelate was observed.
- 公益社団法人 日本化学会の論文
著者
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Iwasaki Noriko
Department Of Otorhinolaryngology Kanazawa Medical University
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Sone Kozo
Department Of Chemistry Faculty Of Science Josai University
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Ojima Heijiro
Department Of Chemistry Aichi Kyoiku University
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