CRYSTALLOGRAPHIC STUDY OF A SINGLE-CRYSTAL TO SINGLE-CRYSTAL PHOTODIMERIZATION AND ITS THERMAL REVERSE REACTION

Reversibility is the salient feature of the photochemical solid‐state reaction of 1 to 2. Prerequisites, however, are first that the compound is irradiated into the long‐wavelength flank of the absorption band of the chromophore (λ = 570 nm), and second that the product is not recrystallized before the thermal reverse reaction. (Figure Presented.) Copyright © 1993 by VCH Verlagsgesellschaft mbH, Germany