Figure 5
One of the large R44(28) O—H⋯O hydrogen-bonded rings in (IIa), viewed perpendicular to the bc plane. Atoms and bonds involved in the large rings are drawn with solid colours. Dashed lines represent O—H⋯N hydrogen bonds within R22(8) dimer pairs between molecules of type A (helix-forming) and type B (ring-forming). These ring structures stack along the c direction to form solvent-accessible channels. A disordered CHCl3 molecule is shown within the cavity. |