Figure 1
The stacking in a layer of molecules normal to the b axis in paracetamol (a) form (I) and (b) form (II) [note that for form (II), only one layer of the two within a unit cell is shown]. Hydrogen-bonding interactions common to both forms are indicated by dashed lines. View of those layers down the a axis for (c) form (I) and (d) form (II). The planar stacking of layers normal to b is clear for form (II).  [article HTML]

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