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The title compound showed in its UV-VIS absorption spectra large red shifts of baudsfrom solution to crystal indicating a pronounced intermolecular interaction between the dithiopyrylene-electron systems.Dipole moment measurement in benzene solution gave a dipole moment valueof 1.90 D which offers a direct evidence for the molecule in cis-configuration.
The title compound showed in its UV-VIS absorption spectra large red shifts of bauds from solution to crystal indicating a pronounced intermolecular interaction between the dithiopyrylene-electron systems. Dipole moment measurement in benzene solution gave a dipole moment value of 1.90 D which offers a direct evidence for the molecule in cis-configuration.