Figure 4
A perspective view of the structure of (II) showing NH and OH hydrogen bonds as dashed lines. N atoms are shaded grey. Note the antiparallel packing of the polar bipyrazolium chains. [Symmetry codes: (i) 1 + x, y − 1, z; (ii) −x, 1 − y, 1 − z; (iii) 2 − x, −y, −z.] |