25. Some derivatives of tert.-butylbenzene

Space-filling atomic models can represent only with difficulty 2:6-disubstituted tert.-butylbenzenes, particularly if the substituents are halogen atoms. In the present paper a number of such compounds, e.g., (V)-(VII), are described and their ready formation reflects clearly on the limitations of these models. Further examples are provided of the displacement of a tert.-butyl group from the benzene nucleus during substitution experiments.