Effect of pressure on iodine complexes. II. Absorption spectra of the charge transfer bands with diethyl ether, diethyl sulfide, and diethyl selenide in heptane.
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概要
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Absorption spectra of the CT bands of I<SUB>2</SUB> complexes with Et<SUB>2</SUB>O, Et<SUB>2</SUB>S, and Et<SUB>2</SUB>Se in heptane have been measured up to 4400 bar at 25 °C. The equilibrium constants and the volume changes accompanying complex formation, and the molar extinction coefficients and absorption maxima have been estimated. The volume changes were comparable with those estimated by the visible I<SUB>2</SUB> bands and by the X-ray data of the I<SUB>2</SUB> complexes in the crystalline state. In the CT bands of Et<SUB>2</SUB>S–I<SUB>2</SUB> and Et<SUB>2</SUB>Se–I<SUB>2</SUB> complexes inversion of shift from red to blue has been observed with increasing pressure though the CT band of Et<SUB>2</SUB>O–I<SUB>2</SUB> complex shifted only through red. This inversion appears to be characteristic of the strong CT complex. Enhancement of the molar extinction coefficient of the CT band has been found with increasing pressure suggesting enhancement of the CT interaction between I<SUB>2</SUB> and the n-donor.
- 公益社団法人 日本化学会の論文
著者
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Sawamura Seiji
Department Of Chemistry Faculty Of Science And Engineering Ritsumeikan University
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Suzuki Keizo
Department Of Chemistry Faculty Of Science And Engineering Ritumeikan University
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Taniguchi Yoshihiro
Department Of Applied Chemistry Faculty Of Science And Engineering Ritsumeikan University
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