Figure 7
Part of the crystal packing for (III), showing the helical chains of tapentadol molecules linked by the chloride ions via N—H⋯Cl and O—H⋯Cl hydrogen bonds. Also shown are the helical chains interlinked by C—H⋯Cl hydrogen bonds. Hydrogen bonds are shown as dashed lines and H atoms not involved in hydrogen bonding have been omitted for clarity. Only atoms involved in hydrogen bonding have been labelled. [Symmetry codes: (i) −x + 2, y + , −z + ; (ii) x + , −y − , −z.] |