Figure 1
Part of the crystal structure of form I, with the asymmetric unit displayed with displacement ellipsoids for non-H atoms at the 30% probability level. C-bound H atoms are omitted for clarity, and hydrogen bonds forming the infinite C11(4) chains are drawn as dashed lines. The inset is the crystal structure viewed down the chain axis, parallel to the crystallographic a axis. Grey and green molecules are related by the 21 symmetry elements parallel to [010] in space group P21. |