p-Methyl-N-(pentafluorobenzylidene)aniline (1), 1,2,3,4-Tetrafluoro-7-methoxyacridine (2), 1,2,3,4,7-Pentafluoroacridine (3) and 2-(p-Methylanilino)-1,3,4-trifluoro-7-methylacridine (4): Four Molecules Representing Key Stages in the One-Pot Synthesis of 1

Article abstract of DOI:10.1107/S010827019400003X

All of the title compounds, C14H8F5N, C14H7F4NO, C13H4F5N and C21H15F3N2, display a characteistic stacking of their ? systems in which adjacent members of the stack are related by crystallographic inversion centres.This leads to a particularly efficient m