Farbstoffchemie in der Schule: Computerunterstützt

The concept of the ideal polymethine state offers a comprehensible explanation of some basic colour and constitution relationships. With special regard to dyes and indicators used in high school education, the light‐induced charge transfer (CT) and charge resonance (CR) is calculated and additionally supported by HOMO/LUMO model pictures. The MOPAC program within Cambridge Soft's “Chem3D” serves as a main tool.