Tetrahedron p. 14429 - 14434 (1999)
Update date:2022-09-26
Topics:
Gerke, Ralf
Fitjer, Lutz
Mueller, Peter
Uson, Isabel
Kowski, Klaus
Rademacher, Paul
Oxidative dimerization of a mixture of the thiolanone 5 and the dithiolanone 4 yields 2c as chromophore of thioindigo 1c, and 6 and 7 as chromophores of still unknown indigo dyes. As compared to 2c, the first ionization potential of the new indigo chromophore 7 is higher, but the calculated HOMO-LUMO splitting is lower. Accordingly, its longest wavelength absorption maximum surpasses that of 2c distinctly.
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