Figure 4
A section of the structure of (Ib), showing the hydrogen-bonded ladders and the stacking of the benzene groups; the view direction is [001]. Hydrogen bonds are shown as dashed lines and C-bound H atoms have been omitted for clarity. Displacement ellipsoids are drawn at the 50% probability level. [Symmetry codes: (i) −x + 1, −y, −z + 1; (ii) x, −y + , z.] |