Figure 3
The chain formation in (I). (a) The anionic hydrogen-bonded chain, with embedded pseudo-inversion centres (shown as crossed circles). (b) The cationic chain formed by π–π interactions. [Symmetry codes: (i) x, y, z + 1; (ii) −x + 1, −y, −z + 1; (iii) −x, −y + 1, −z + 1.] |